My squad used to eat there every week (I think it was Friday fish day) when I was stuck "training" the 256th Inf Bgd from Louisiana. Believe me. Patrons of that restaraunt were armed. We certainly were, as were our friends who ate there. I doubt seriously that we were the only people there that one day that week, in an Army town, in TEXAS for god's sake, where men weren't carrying. It's like saying you walked out into a thuderstorm and only got hit by one raindrop
After the massacre we laughed about the new law. Everybody we knew carried anyway at the time. We were military of course, but you think our friends, families and neighbors were as well? Of course not. They carried. As I said, it's an Army town. Only place you didn't was in a bar, for obvious reasons. Sure that lady left her gun on her carseat. What a nice law abiding idiot. She was great propaganda though, I am sure the gun lobby loved her. And made sure she had plenty of cash to run for office later. But you can bet a number of customers were armed and hid, ran, or simply pissed in their pants that day. He got over 40 people, more than 20 dead, and the only guy who had any balls at all put himself through a plate glass window so other people could get out. Lot's of macho texans there THAT day, I tell you what.

That lady['s daddy bull rushed the shooter and got put down. I always thought he was the only real man in the building that day.
As for the connection between higher violent crime rate and higher private gun ownership, I couldn't name one off hand, but there have been a number of studies comparing states with stricter gun control laws and lower violent crime raes (specifically gun deaths and shootings) as well as many international comparisons including countries where EVERYONE is trained such as Korea or Switzerland but civilians may not own, or guns are not allowed (Japan, UK, Aus, Etc.) and people are not trained (no conscription). And then there is us here in the US: high training rate, high gun ownership rate. And high gun casualty rate. Ye Haw.
Mind, I own a handgun, and am well trained in how to use it. I am also license to carry concealed in the Great State of California (and maybe still louisiana). I own a number of shotguns, and as you would expect, a good number or long rifles. I own an M16A2 and an AK47 (yes they are real). I own an SKS, several 9mm handguns an old Colt Navy revolver, and an M1 Garand which are at my fathers (outside Tyler, Tx),. I like guns, believe in every American's right to own them, and an obligation to be trained to use them. I probably will never hun t again, and most of them will stayed in my gun cabinet until I die. But there you are. I'm a shooter.
However, I think it is downright stupid, bordering on criminally insane, to claim that arming college students will do anything but increase the number of shootings you'll see on campus. Same reason for guns in bars. You don't hand a weapon to a drunk, cause he's more likely to shoot somebody when they sing a song he hates. 19 years old are not the smartest, nor the most stable of people. Why in the world would you wont to put firepower into the hands of one unless he was in a controlled, stable environment where he only got to play with it under safe conditions the army)?
What we need is proper protection provided to them, instead of fat out of shape part time security guards who don't want to get out of their cars. VT's problem was a crappy security force, not a need for guns in everybody's hands. To claim otherwise is just plain silly, when the school security force didn't even repsond to the shootings or close the campus, or even the area where the shootoings occered KNOWING THE SHOOTER WAS STILL OUT THERE!
The answer is real trained police. Not idiots with handguns under their coats who have no training and no experience in a classroom full of other armed isiots with no training or experience. The whole idea is ludicrus, when you think of it. First time we have some nubag fart worng, you'll end up with pimple faced geeks blowing the snot out of each other until the room is filled with smoke, everybody is dea, and the poor proffesor will still be standing at the chalkboard, which has been shot to hell, wondering if he should crap his pants or run lol!