Wasn't some type of bump-fire device what got Ole' David Koresh's compound in Waco, TX burned to the ground by the ATF back in the 90's? Seems like later reports turned up that all the firearms recovered from the compound were semi-auto, legal for purchase firearms.
Just sayin..... don't be the next Dave.
I'd rather the legislative gun-haters focus their attention on bumpfire stocks than high-cap magazines. But that's personal opinion. And don't take this the wrong way, I don't have anything against bumpfire devices. I do agree with a post further up the thread - probably the safest place to be is the POA, at least after the first shot.