Just have some people kill them self or make a scene under the influence of salvia, then you'll see it's legal or not :D By the way, it's illegal in several states of USA which is mainly because of stupid youtube videos. But again it's not very right to compare it to most well known psychedelics in human history lsd/shrooms. I totally agree with you about its intensity, it's more intense than anything maybe even more than DMT, which I haven't tried yet. I've tried salvia for 10-15 times. I know it can totally fuck you up for 10 minutes, I've seen my friends scared the shit out, forgot who they are, tried to escape from windows stuff like that. Luckily I haven't experienced anything bad, but everytime I try it I become speechless, can't even describe what I experienced because it's so alien that you can't put it to words.