I just checked the source you linked to. It appears to be a very biased and questionable one.
For one thing, the Violence Policy Center is strongly biased against private firearms and part of their purpose is to promote gun control legislation.
[ame=http://en.wikipedia.org/wiki/Violence_Policy_Center]Violence Policy Center - Wikipedia, the free encyclopedia[/ame]
The VPC has been criticized for biased or inaccurate studies before:
Criticism of the VPC
Hardly makes them objective... indeed they have been criticized by OTHER gun control orgs for some of their positions. Not much of a source.
For instance, the very first case study was about Micheal MacLendon. I looked up the story mentioned in the case study. In that story, there is no mention of MacLendon having a CCW. In fact, the story says this:
Officials: Alabama shooter depressed over failuresMcLendon had been a Marine briefly but was discharged for falsifying information.
If he was dishonorably discharged from the US military, in many states that would bar him from obtaining a CCW.
A virulently biased gun-control advocacy group whose accuracy, honesty and reasonableness has been widely questioned isn't much of a counter argument.
EVEN IF the Eleven cases listed on the link to which you provided are all truly about CCW's that killed more than one person (which I doubt the accuracy of for reasons already given), that would still be 11 people out of somewhere around twenty million CCW's in America. That would be 0.000055%... a very very low ratio.
How many mass murders have there been total, in the USA, in the past twenty years? If you define mass murder as one individual killing three or more people, there may have been hundreds. Below is a partial list of mass killings that is by no means complete. You have a list of 11 people that allegedly committed mass murder and allegedly had CCW's from a clearly biased source... even if we take it at face value there are obviously several dozen non-CCW mass murderers to every one CCW?
[ame="http://en.wikipedia.org/wiki/List_of_mass_murderers_and_spree_killers_by_number _of_victims"]http://en.wikipedia.org/wiki/List_of_mass_murderers_and_spree_killers_by_number _of_victims[/ame]
Again, this goes along with what I was saying, and what statistics prove: CCW holders are on average FAR more law abiding than the general public. They are statistically FAR LESS of a threat to anyone than people among the non-CCW general population. There is NO reason to believe that allowing adults with CCW to carry on campus would increase the risk to anyone.