What do you consider "Sensible gun control"? (Read the post before responding)

[shadowrider]

Over the past week or so, there have been untold numbers of posts calling for more "sensible gun control", but very, very little in the way of substance.

Don't answer this post with emotional rants about keeping guns out of the hands of madmen. I and all other gun owners agree with that 100%. That begs the question, how do we PRE-EMPTIVELY determine who is, and who is not, ABOUT to go off?

Two guys, both are loners, both live alone, both are social outcasts, both smoke a little pot, both put up questionable rants against society on a social networking site. One becomes a homicidal maniac, the other sits on his porch and talks to himself (and answering) but is otherwise harmless.

HOW do we determine who the threat is? This requires some thought to put this into legislation that is effective and NON-INTRUSIVE to lawful gun owners rights.

Which of the 22,000 gun laws already on the books isn't enough and how many more are necessary to fix what is wrong with what's already there?

So, what are your "sensible gun control" regulations?