The vast majority of school teachers are not going to want to be carrying firearms while they are teaching kindergarteners, even if they were allowed to do so.
I agree.
The police officer at Columbine was completely unable to prevent the damage done that day, even after confronting the shooters, he was pinned down under fire. When you have a tag team of suicidal assailants armed with heavy assault weaponry, a police officer may not be able to stop them. What if a James Holmes shows up (Colorado theater shooter) dressed head to toe in ballistic armor and shoots the armed officer(s)? When you have assault weapons with high capacity magazines, all you need are a couple of minutes to kill dozens of people.
Bulletproof vests only work on pistol rounds and even then still don't stop internal trauma like broken ribs that put you on your butt and out of the fight.
Columbine was during the last ban and only involved 12 gauge shotguns and 9mm pistol/carbine. At least one of the 9mm's along with its high capacity mags was banned during the time and that did not stop them from using it.
Assault weapons are for soldiers storming the beach at Normandy, not for soccer moms with mentally ill sons, or anyone else for that matter. They suck for hunting, the only thing they are made for is killing large groups of people in a very short amount of time. Objects like these have no place in modern civilian culture. If you can't protect yourself and your family with a sidearm and/or hunting rifle, perhaps you should brush up on your skills.
Hunt much?
An AR15 is a fine hunting rifle, most states have mag capacity limits for hunting large game. They are really nice for target shooting so you don't have to keep reloading smaller mags.
The AR15's .223 round is a mediocre deer round but it is also available in many other calibers (.308 and .243 are stupid common deer rounds) New ones like the 6.8SPC are also a great hunting round that has been catching on (and doesn't require the expensive AR10 chassis to shoot them)
For varmits (foxes, coyotes, groundhogs, prarie dogs...) the .223 is great as is the comfortable lightweight AR platform rifle. Around my house is thick with coyotes and with sheep (the greatest weedeaters known to man) that is going to be problematic but an AR15 would be a great coyote gun. For intruder type home defense I am a staunch believer in a shotgun.
Banning the best selling rifle in america because three nuts made headlines with them in a year is stupid. Care to guess how many thousands were sold this last year before the ban talk spurred record sales?
The previous ban was allowed to expire because "assault weapons" (definitions of which are almost all cosmetic) are used in very little crime. Pistols are where it is at for that, but they are not as scary looking.
EDIT:
I forgot to hit on this at first but I do think something needs to be changed with gun ownership laws in relation to mentally ill people. My pending cousin in law had a few to drink and was just over the limit and a lady blew through a stop sign infront of his truck and her infant was killed. He did time for it and is now a registered felon, and now my cousin has to keep her shotgun at her dad's house. No violent past or nothing be there cannot be a gun or even bow kept in the house. I think moreso than that it should also apply to metally ill people. If someone is off their rocker there should not be a gun kept in the house. It may not prevent all but I think it would help with some. Since the last guys mother appeared to be an otherwise upstanding citizen (questionable judgment but didn't do a thing legally wrong) I think it would have helped there... and barring a car accident on the way to school is about all that would have helped.
My other cousin was a special ed teacher in a bigger city, had to deal with all sorts of wierd kids. They would hit her, cuss her out, kick, bite scream, throw poo... whatever. All she could do is send them to the principles office, parents did nothing but collect $$ for their handicapped kids. She had to wear her husbands middle school soccer shin guards (she is tiny) to work for protection from being kicked. She was told nothing could be done until they really hurt someone and they could get the police involved... that needs to change too. Sounds like a time bomb to me. I was really glad when she left that job...