I dunno, I've been pretty fucking wasted, and my semi weekly trip to the bar always includes a toke in the back alley, at which point I've had a "few", and I've never been raped. What I mean I guess, when you get to the point of inebriation where you no longer taste the alcohol you're consuming, one would be less likely to taste a drug in one's drink. but i suppose a crushed up/liquified pill *would* be distinguished in a drink irrespective of one's level of intoxication. I do not condone the use of date rape drugs...or any other method/means of rape.