Gun control simply does not work. The guys who aren't supposed to have the guns in the first place get them anyways.
You don't hear gangstas out on the street like:
Mr. Thug: Check out this new glock I got
Mr. Crunk: Whoa whoa whoa! Is that registered?! Did you wait the required 3 days to purchase it? If not, then I'm afraid we have no discussion here!
Mr. Thug: You're right. I was going to shoot up some Crips, but now that you bring that up; I should turn this in to my local law enforcement agency, where I can trade it for books.