1 minute ago, whafrog said:* full disclosure: this would never happen, I'm way too much of an introvert...and I don't need an X card to say so... However, I do spell out the same things for my own group, so it's not a stretch to imagine explaining the same things to an ad hoc group.
Did I read correctly that you've never done the sort of public gaming I'm speaking about? Or are you saying that you used to, and now no longer do so?
No disagreement that there is a GM's responsibility, but I'm more interested in knowing the answer to the first two questions.