Residents should be more concerned that today, there is no legal way of BUYING a handgun, since there is no 01 FFL's that are willing to transfer one into the district.
Funny, that one of the arguments DC used to argue against Heller was since they weren't a State, the law didn't apply, but now they will follow Federal law covering States in that one can not buy a handgun outside of one's home State without transferring it through a dealer.
What if you move in from another state where you have legally purchased firearms?