But, your parents KNEW it was R-rated, they didn't go into an UNKNOWN and then got whatever they got... I am fine with a hackathon saying "This is X rated, for

But, your parents KNEW it was R-rated, they didn't go into an UNKNOWN and then got whatever they got... I am fine with a hackathon saying "This is X rated, for improving <pornsite>" -- that is perfect fine, it isn't about the specific expectation, it is about SETTING one. Having no guidance means that if this is acceptable is far more grey... I think it if was supposed to be G-rated, everyone would agree it was not. Clear boundaries and expectations help everyone, from a parent deciding if their children should participate to an adult deciding if they want to attend.