And they kill the insane people trying to hurt/kill others. Sounds like a win-win to me.

As to your point: clinically (or diagnosably) depressed students are not rational. They may wonder who is going to kill them if they start shooting, but it is likely to be with morbid fascination rather than fear. “Suicide by cop” - heard the term? They want to die. They need to die. If no one else is willing to do it for them, they shoot themselves. So there is absolutely no deterrent by arming more students, teachers and cops. The question is only whether that is a more effective way to reduce gun violence than banning them.

Guns only deter sane people. Sane people don’t need to be deterred. So guns are of no use.

Not sure where you got that statistic, but even if we assume its accurate, that means 6 out of 7 aren’t likely to go on a killing spree. Yet, those 6 out of 7 are helpless to stop the 1 when he does. Additionally, think of the deterrent effect of having that 1 wonder which of the 6 is armed to defend himself.

“So do pet owners, car owners… Should we blame the tool or the person responsible for allowing it to kill?”

TR, pet owners rarely use their pets to kill people with. Even though it is an extremely rare occurence, some breeds are nevertheless banned in many countries already. Pitbulls are an example.

Car owners rarely intend to kill people with their cars - check the FBI murder statistics again. And cars have huge benefits, whereas privately owned guns (other than simple hunting rifles) do not.

There are always going to be irresponsible people. When we can reduce the harm that they can cause, without negative side effects, we should do so. If you have a plan to deal with violent offenders BEFORE they offend, please enlighten us. About 1 in 7 university students are DIAGNOSED with depression, and more than 1 in 12 seriously considers suicide. What do you propose to do with them? Lock them up? Put them under surveillance? Do we take their guns away? And those of their family and friends? What about the ones that aren’t diagnosed?

Guns aren’t responsible for murder, but they enable them. They offer material help and support. In the absence of any corresponding benefit to society, they need to be banned.

You are beyond parody.

I’m going to be very generous and assume you’re an idiot savant. So I will ask one question at a time. DC has had a gun ban [court decision noted] yet has also stripped my stomping grounds of the title: Murder Capitol of America™. Thank you DC. Now Idiot savant, how do you reconcile this?

This is not a question. As the Texas Rainmaker™ pointed out, the ban on murder is still in place, so all this talk about banning guns is irrelevant, as it always will be since it’s a Constitutional right to bear arms.

Again from the Good Doctor™:

“A fear of weapons is a sign of retarded sexual and emotional maturity.”

Sigmund Freud (”General Introduction to Psychoanalysis,” S. Freud)

So do pet owners, car owners… Should we blame the tool or the person responsible for allowing it to kill?

First, Ireland. IRA member Caraher was arrested with a 50 caliber in his possession, :
http://www.telegraph.co.uk/htmlContent.jhtml?html=/archive/1997/04/18/nira18.html

Second, Afghanistan. Ronnie Barrett claims that they were sent to the mujahideen by the truckload, as part of the US support:
http://www.cbsnews.com/stories/2001/10/16/terror/main314868.shtml

Others claim that these guns were bought on the private market, so the weapons weren’t shipped on the US government’s behalf. Not sure which is worse.

Third, drug cartels from Bogota to Los Angeles:
http://www.washtimes.com/national/20050820-122749-4342r.htm
But mostly in Mexico:
http://www.criminology.fsu.edu/transcrime/articles/U_S_%20Guns%20Smuggled%20Into%20Mexico%20Aid%20Drug%20War.htm

If you want to have a bit more general information of criminal and terrorist use of the 50 caliber, read the GAO report:
http://archive.gao.gov/f0502/162586.pdf

And what is the good side of civilians owning this gun again?

Exactly.

Give them time, they’ll tie in abortion and global warming.