Well as the saying goes... "everything in moderation including moderation"
Yes there are people who will take anything "too far" (in other's eyes) possibly to their detriment however that is their decision to do so and without agreement or disagreement, I accept and support their right to do so... it is not up to any individual or group to tell another what they can or can not put into their physical body... nor does it work as per Nancy's campaign of "just say no" or prohibition or any other effort of this nature. As searching 57 said "live and let live, invest in true knowledge".
Just because one's experience affected that one in a less than desirable sense does not mean it should be outlawed... I fully support you if you make a decision to have an experience however cannot support you or anyone else in telling others in what they should or shouldn't do. It's not your or anyone else's place to control like that. Very recently (3 weeks ago) a friend who has never smoked cigs, rarely drinks, has two degrees and a multitude of mental, stress, physical issues tried vaping cannabis (2 "tokes") for the first time... her response to the experience was "wow, I felt so calm, my mind slowed, I wasn't so keyed up and frantic, the tension in my shoulders and neck went away immediately". So with knowledge, "set and setting"... it isn't the "devil's herb" as advertised in the 60's and 70's... not everything that "they" have told us is to be believed...
There is nothing either good or bad, but thinking makes it so.
A quote from "Hamlet" by William Shakespeare