Well that certainly is a fun little statistic isn't it...I'd be interested to know where you retrieved that from.
This is getting slightly off-topic, but...
What we are discussing here is the Constitutional Right to keep and bear arms...and the fact that it is being taken away (DC ban is one example).
Now consider the other issue at hand, namely: Concealed Carry Permits...since it is impossible for a high-school student to obtain a CCP, this should be a non-issue, but since you went there...is it legal for a student (or anyone else) of legal age to have a firearm in the trunk, front console, rear seat, etc. of their car? State laws vary, but if the firearm is owned legally then I doubt it. Why then should it be a problem to park the car in any parking lot (school included) and have the firearm present?
Having a shotgun in your trunk doesn't change the chances of violence one way or the other.
Airline Pilots are now allowed to bring firearms aboard their craft in case of terrorism, what's to say that schools are safe from this threat? Maybe we should allow Teachers to arm themselves while in class.
None of that is very relevant though...the question here is: Should law-abiding citizens, who have been through extensive background checks, had handgun training, and passed a government exam to legally carry a concealed weapon for defense be allowed to do so on a college campus? The answer is yes, plain and simple.