I'm giving the commenter the benefit of the doubt. I don't think he means that "there's nothing wrong with getting someone hammered to try and sleep with them", he means that "society seems to have a much smaller problem with getting someone hammered to try and sleep with them despite it being the same basic idea as GHB."
Dunno. To me there's a vast differnce between getting pissed and falling into bed with someone as a mutual "WAHEY! let's go for it!" thing and "if I keep buying her drinks maybe she'll get drunk enough to take her top off". The latter seems little better than spiking them.
--edit-- OK so I've read his other comments and it was clearly a comment on society and meant to be taken at anything but face value. I'll be the first to admit that in discussions like these I can easily suffer from a sense of humour failure, if not a complete lack of sarcasm detection.
