What's obnoxious about this whole situation is the fact that everyone is looking at this and trying to blame professors and security at the school and all these other extraneous factors that can almost never be controlled.
You never know how high of a correlation there was between the student and the professor. Pointing the finger at the professor is the wrong thing to do. Interesting, maybe - but wrong. Regardless, she was protecting his rights.
Additionally, nobody metal detects you while walking into campus buildings, so yes. Anyone could have come in and shot the place up. Yes, SWAT teams should have arrived early. But they didn't.
I will possibly get shot by a few of you for saying this. And I am a firm believer in the Constitution and a believer in individuals' rights. I get pissy when the government takes stuff away from me. But the gun this kid had should have never reached him. It should have never been on THE MARKET. The only purpose of an automatic shotgun like the one he had is to kill. Why they are legal for anyone other than law enforcement in this country is completely beyond me; it should be beyond the NRA. And don't say "background checks," because you and I and everybody knows that in this country you can slip money under the table and get ANYTHING you want. Obviously, the system is flawed. So I ask, why is this product even on the market in the first place? If Cho had walked in there with a hunting rifle he would have been stopped before this many people were killed. And the only reason this number of people were killed was because of the rifle he was using.
Please stop looking to the past and targeting slightly-valid-but-irrational correlations with professors because it isn't solving anything. This shit will continue to happen if people only concern themselves with the professors.