What's wrong with Ketamine? Everybody (or at least population majority I'd bet) have consumed hardcore drugs like Alcohol, Cocaine, Ketamine and so-on, what does it have to do with anything?
You have not tried any hard drugs like Alcohol or softer ones like Marijuana in your lifetime? I mean kuddos to you but I don't really see what's wrong with it in moderation, and shaming people that decide to partake into it is a bit low :)
Haven't you tried?