It would be like saying I support gay marriage

But I'm against gay sex.  For the record, I've not heard the argument that the Second Amendment only guarantees  the right to bear arms, not bullets.  It wouldn't surprise me.  Like most things in the world of immediate consumption, especially with the Internet, there is no filtering process for bad and dumb things.  So that someone would make such a ludicrous claim is not shocking.  Nor is it shocking, given the mentality of our age, that others who you would think should know better would hang their hopes on such a laughable idea.