the best thing about coke is, meth heads can't afford it.
however, the most mind-blowing thing of all is that people still use it.
that said, if you find yourself in need of ridding yourself of an addict (any will do), simply tell them (as frantically wild eyed as possible) that they "are welcome to come inside, but the place is REALLY hot as the cops have been around asking about them. of course I told them I have no idea who you are....but they might still be watching so you better come in".
in no time at all, they'll be out of your hair.
I hope this helps.
