I dunno anything about that, but I advise you put your intentionally downloaded hacks in a seperate subdirectory, like "hax" or something, and then systematically destroy anything that looks funny in your downloads directory.
Pherverstool can help also. Unfortunately, I don't have the link, and Phervers couldn't think of anything cool and memorable for it, like pherverstool.com or something.
pherverstool.com? *spits soda everywhere* HAHA! *pictures pherverstool*
Man I must get my mind out of the gutter sometimes.