Tbh, I don't think he
@vizzorz was playing gate keeper, as you say.
So I am not sure he should be called stupid, either. I don't like it.
I think he just stated his distaste about someone casually talking about substances that (at least in Europe) are considered extremely dangerous and negative, for the way they have commonly been used.
Tbh, I also hadn't heard about them in the contest of body building and I have to say that, to me, it seems very odd.
With this being a harm reduction forum, ghb/gbl being talked about in terms of "aren't you lucky in Europe you can find it as a cleaning product" when it is mainly abused as an intoxicant (someone did mention it is used as a date rape drug) is, frankly, quite shocking.
I did not comment, when it was first posted, but reading your reply I am quite disappointed, especially after you tell us you have been involved with this forum for such a long time.
In any case, even leaving this specific issue aside, people have complained about other off topic posts on the Qsc thread.
If only from this pov, his grievance was legitimate, if all others were also considered fair.