Not including the Sandy Hook shooter who was obviously mentally disabled the rest of these shooters seem to have a common profile.

1) They had never been laid before.
2) They had very few or no friends on their Facebook page.
3) They blamed society as a whole and especially their peers for the above two realities.

So I propose adding a few questions to the current gun purchase questionnaire.

1) Have you been laid in the past year?
2) Do you have a Facebook account?
2.1) If answered yes to 2 do you have more than 20 friends.

Answer no to any of these questions then you cannot legally purchase a firearm.

Basically these shooters are pissed that they are losers. As always they should take Dan's advise and set themselves on fire and leave the rest of us alone!

And until they all take Dan's advise these shootings are just a cost of a free people in the USA.