Comment: It is completely useless.

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In reply to comment: I think in general we should (see in situ)

It is completely useless.

Honest people will go get their background check, people intent on committing murder will go steal a gun from someone who passed a background check.

This is the article that got my posting privileges revoked:
http://bklim.newsvine.com/_news/2013/05/12/18212165-dr-stan-...