There have been a number of deaths and serious side-effects caused by such activities, and some have gone "mainstream" in the news media (e.g. the diet-pill deaths a few years ago).
SO...
In a free society one is free to be stupid and take things one shouldn't.
In a nanny state on the other hand the government protects us from ourselves because we are too stupid to do it on our own.
Don't know about y'all but I choose the free society over the nanny state.