Guns aren't legal to buy or sell for a felon! That's what black market I'm referring to.  Again common sense it's a luxury that people just don't seem to employ anymore. 

I never said the thief was a victim.  But your logic evades common sense it literally runs from it by leaps and bounds.  

Your argument is that all guns should just be able to sit out and free for anyone to steal? Because you want to assume that no one will try? 

Ladies and gentlemen this is why the kid who was shot at Home Depot even occurred.  Because his roommate was a registered gun owner and he wasn't.  And the registered gun owner almost ate a bullet from his own roommate because the kid shot at him first.  

This is why felons aren't allowed to live with someone who owns a firearm.  (Not that people actually follow the laws) but I'm sorry I tend to follow life like Enders game "I win the first fight and all fights that follow before they even begin" 
"common sense isn't so common anymore."