I haven't gotten in a situation that awful, but being straight edge has led me to the whole, "not even a little bit?" conversation multiple times, and I fucking hate it.
If I say, "I do not consume alcohol or recreational drugs," I mean that I do not consume alcohol or recreational drugs. Period. I added no caveats there.
I don't know what part of that is equivocal.
I didn't say "I don't usually consume alcohol, but maybe on some occasions I will!" or "I limit my alcohol consumption very heavily." I said "I do not."
I think it has to do with people constantly projecting their own preferences in life onto other people. To me, "some people enjoy certain things differently than you" doesn't seem like some elevated galaxy-brain take that's incredibly difficult to grasp or understand, but interacting with many people in society has easily taught me that this isn't the case for a whole lot of others.