Loughner declined from the army, but passed a background check to buy a gun?

[purist]

No shit you weren't, but you were still positing that crime (e.g., robbery) can be reduced by making access to guns more available and oversimplifying a complex problem. When caught on your canard, you proceeded to insert a series of extremely restrictive qualifiers you had neglected to specify in your initial post ("opportunistic criminals").

Try again.