I've done LSD, and even when I was doing it, I did not recommend it. If someone asked me, I told them truthfully what I experienced(which was not usual--I rarely got anything visual, it was more auditory and thinking-stuff; I was one who'd not stop talking while tripping) and then said that if they're happy with who they were, they should not, and if they weren't they should think really hard before trying it.
It helped I was a Pink Floyd fan before that as a teen(before I'd even smoked pot, actually) so MY first LSD story was hearing about Syd. (there was no DARE at my high school, but that might have been after my time; I graduated in 1987)I always felt it wasn't something you did for fun, but for insight. I had friends who did it like it was beer. A few of those are all Syd Barrett now.