I wish it was that easy... and while many of my posts here can be seen in a sarcastic and/or confrontational way... I mean the following in the most serious way... how do you want to implement such a system?
I doubt you will find many firearm owners, NRA members or leaders who think that every single nut should have the right to a firearm... the issue is about how to we choose or legislate who can and who cannot legally own?
What constitutes 'have shown they ought not to have them'? Who decides that? Is there a process for determination? What of a process for appeal in case of error?
Which medications are on the prohibited list? What happens when the medication taker ceases them because they are no longer needed? What if the medication no longer has the negative effects on the taker due to the length of time it is taken?
When it comes to 'record of violence, uncontrollable rage etc'... what kind of record? Police report? Arrest? Conviction? How many such 'record's?
I was thinking this week... that under such a potential line of thinking... one could make an argument to prohibit just about any transsexual (MTF of FTM) from legally owning a firearm.
Transsexualism (under several different names) is considered a 'mental disorder' by the DSMV-IV:
http://www.genderpsychology.org/transsexual/dsm_iv.html
Often those suffering from this 'mental disorder' will pursue medications in the form of hormones to help offset or correct this disorder in some way.
Such medications (hormones) are very powerful drugs which can drastically effect brain chemistry. Estrogen can cause massive mood swings, while testosterone can lead to strong feelings of aggression.
It is also said that transgendered persons have a higher than average rate of suicide,
http://www.lauras-playground.com/tra...emorial%20.htm, further suggesting a link to a mental disorder (suicide not generally being a rational response to adversity), and if someone is so susceptible to showing such a blatant disregard for their own life... viewing someone else's life with such a disregard is not far from the realm of possibility (ie murder-suicide).
Note... I am not supportive of any such policy based on the above, nor even the ideas mentioned in the immediate section above, it is simply a thought experiment based on available data which can be used to paint a given picture.
Ideally yes, only he passed a background check just a few days before for the single shotgun he purchased and began the attack with, the rest it seems he took from the body(s) of those he killed.
Short of a giant super magnet in space, which is somehow set only to "gun"... you can never fully prevent such acts... at least with a firearm.
With limited exception yes... the only recent one being that of Anders Behring Breivik (2011 Norway attacks) who it disturbs me to say sounds rather rational in his views, even though I disagree with his actions & motives.
It's easy to say after the fact "clearly so and so was a nutter"... though not all nutters are violent, let alone to this level, and sorting those who are from those who are not is an absolutely herculean task that even the ACLU I think would have a problem with, consider this... While Fox News has focused more on the 'security clearance' angle than the gun angle with regards to the Navy Yard shooting, there is an interesting thing to consider... I have a Concealed Pistol License which enables me to legally carry in 27 states, with my non-resident Utah Concealed Firearms Permit that # expands to 33. While the state I live in only requires a periodic check every 5 years to make sure I'm on the up and up, Utah CFP carriers have their record hit about every 90 days to look for anything that doesn't seem right. The federal government does not automatically do such a routine check for security clearances, nor do they do so for firearms (in the latter case because the ATF & FBI are prohibited from maintaining a list of those who have undergone background checks as a result of an ATF form 4473 for more than a couple of days).
As a first step... shall we start with a master federal database of all firearm owners (which would require outright registration) so that those who are flagged with sufficient issues & known to be owning a firearm can be disarmed?
To expand a bit, while it may seem like a simple task to simply have a large database of those under indictment or information in any court for a felony, ever been convicted of a felony, are fugitives from justice, is an unlawful user of or addicted to marijuana or any depressant, stimulant, narcotic drug or any other controlled substance, has been mentally adjudicated mentally defective, dishonorably discharged from the military, subject to a court order against harassment, stalking or threatening a their child, intimate partner or a child of such a partner, been convicted of domestic violence, renounced US citizenship, is illegally in the US (all items taken from a 4473)... how well can you trust this data?
I come from an extensive IT background and can talk at length about dirty data... it exists everywhere, triply so when you are accepting data from multiple disparate sources which may not have the same quality controls or schema as you and that you do not have the resources to validate every entry in to.
Turn it around... we have a no fly list that will occasionally flag a US Senator as being barred from flying,
http://www.cbsnews.com/2100-224_162-610466.html, we have a congress that wants to require photo id to vote (with the fear that some voters will be disenfranchised because they cannot afford an id or cannot prove their identity to get an id)... we also have a federal government which is less than two weeks away from rolling out the Health Insurance Marketplace as part of Obamacare, and despite several years of lead time, are having massive issues with preparedness & security.
I'd mentioned the ACLU earlier... and While not generally a friend of the second amendment, I could only imagine that the degree of data collection & non-adjudicated data processing & cateorigization would upset even them as once you have a database that contains those who should not be allowed to own a firearm (and so should be checked from time to time to make sure they've not illegally acquired one) would easily be turned to other purposes that they would be staunch opponents of.
Again I say, like many, I do not want nuts who are going to commit acts of violence to own firearms... the issue is preventing them and only them from such acts and not affecting the larger population... something we cannot do reasonably without getting into a degree of profiling that most would find offensive, because that degree of profiling would not just logically apply to firearm ownership but a multitude of other aspects of life.