That's just one of the lots of small social games I saw while observing especially group conversations with narcy / A type people, and the winning move is not to explain yourself (they can just go yeah yeah sure) or to lash out or roast them, is to find a way to suggest that you are more moral than them (ex: "Would you let your son smoke weed in the college?" You: Well I am a parent that respects their kids judgement and ability to make right decisions so if he chooses to do after 18 he can be my guest) At that point they might go "Oh I respect it too I just.." and you can do the mmmmhmmm sure sure. It might seem insignificant but it requires a few such trap questions and moves to make you look like an ass to the people in the group so you gotta retaliate.