If someone asks me "m/f?" I answer "f/p?" or something like that - two letters and two letters again The same with "asl?": I write something like "djk?" and when they ask "what?" I answer "oh, didn't you write three letters just for fun?" If someone is searching for a horny female, I use to say "I'm female" and when he continues with that shit, I say "I never said I was horny..." and dc.
Well, I still use it sometimes, since I've found two of my best friends there too.