Shooting at Middle Tennessee State University : what we learn from it

It happened and there is no way we are going to take it back, condolences to the hurt families but let us see how to do away with such problems next time.
The real cause of this valentines day saga is still unclear. But at the age of 19, 18 and 20 thats when we love most in our lives. Thats when its very hard to control ones immotions and feelings, to the extent that we may not know what we are doing in such a scenario.
Colleges and Universities should always control arms inside schools. Many of such cases have happened before.  But what happens , security is tight after such incidences and then after it goes by slow down again to normal routine of being reckless.
Police had to search for the shooter meaning that it was all done in an isolated place. Schools in USA and every where in the developed world should have surveillance cameras installed almost every where, save for the last bit of privacy for ones life.
The shooter being above 18, what does it mean? He is mature but to me, such people dont deserve a panishment like that of street gangs and all that. This is something of emotion and at times allitle bit young minds.

Would love to here your say to this and also contribute. Thanks.