Every time there is a shooting like this, people call for tighter gun laws.
The kind of people who gun down 12 innocents for no apparent reason are NOT the kind of people prone to obey laws in general!
After Columbine, there was a huge hue and cry for tougher gun laws in Colorado. One of the parents who lost his daughter in that massacre made a valid point. He said, a couple of years later, something to the effect of: "Dylan and Eric vioalted 36 gun laws in the process of doing what they did. Do you really think, if there had been one more law on the books, that they would have turned to each other and said 'Dude, I'm cool with violating 36 firearms laws. But 37?? No way!" That's a paraphrase, but it catches the gist of what he said. I think enforcing existing laws is generally preferable to making up new ones.
Yeah that would be true here but this happened in England, where if I'm not mistaken has some extremely strict gun laws compared to the states. Furthermore there is not a very big pro-gun lobby in England so I doubt anyones really going to complain if they ratchet the gun laws tighter. In fact I think the laws are strict enough that the beat cops don't even carry firearms.
All that aside it's still a tragic incident. It never ceases to amaze me at what'll set people off and what they'll do because of it. I hope all the people who are still alive can move on after what's happened.