And, like Ryazania said, if all guns had to be registered but they were compulsory, there'd be way less crime. And if some crazy person shot someone for no reason, it's not like it's any hard to convict him of murder (at which point he should be executed, someone who kills someone doesn't deserve to live)
You talk about the second amendment giving you protection from state tyranny, then hand the state power to kill people. The only countries which execute as many people as the United States in a year are China, Iran, Iraq, Saudi Arabia, and Congo. Are you proud of that little group of equals, Garth?
The problem goes deeper than gun control. As much as I dislike Michael Moore, he had a point when he points to the murder rate in Canada against the proportion of population which has a weapon (Much, much lower than the US in the first case, equal or higher than the US in the latter). However, gun control would have made this a lot more difficult. He may have had the arms illegally, but in a country which is awash with weaponry, where you can buy an automatic weapon younger than you can buy a beer, it isn't surprising that he got hold of them.
It's absurd to suggest that students should have had more access to weapons, so that they would be safer. How about setting up a society in which you don't even have to consider going to lectures with a handgun under your jacket?