IMHO: the challenge is that we’re now asking TD’s (or pub owners, in your description) to administer societal behaviors that should be de facto standards… and even worse, some people blame the TD’s if they didn’t explicitly address every possible infraction.
So for example, some people want pinball TD’s to give a speech at the start of their events decrying behaviors that aren’t considered acceptable at the tournament. If I’m the TD, how far do I have to take this? For many people, it’s simply assumed that “gender, racist, or other forms of discrimination” are unacceptable, that goes without saying… but that’s not necessarily true for everyone. What about religion? Most people would never consider degrading their opponent because they were wearing a cross, or a yarmulke, or a hijab… but that’s not necessarily true for everyone. Heck, most people would never consider punching their opponent in the face if they lost… but that’s not necessarily true for everyone. So as a TD, am I required to give a two hour speech detailing every possible behavior I can think of that’s unacceptable at my event? If not, where do I draw the line? Personally, I’d prefer to say “Hey, we’re playing pinball, everyone smile and have fun and treat everyone around you with love”, but some people would consider that insufficient.