Right now those are one of the worst traits in the entire game (probably right after pyromaniac). For me personally its not bad just because those people are constantly going on drug binges and ignore the policies (although it matters), but because those traits are simply threatening pawn's life. Tolerance is just going up so fast sometimes and you can't do anything about it. It leads us to addictions, organ damage (brain, especially) and death.
So here is what I suggest: if colonist has chemical interest/fascination trait, tolerance must go down much faster. They want drugs? Let them have it. But it shouldn't kill them while they do.
So here is what I suggest: if colonist has chemical interest/fascination trait, tolerance must go down much faster. They want drugs? Let them have it. But it shouldn't kill them while they do.