@thenomain This is actually part of why I'm keen on that approach, actually. There's some things -- using the lock example again -- that could be generating more staff work and complaints if someone, for instance, complains that someone told them to get the heck out of their bedroom and they'd assumed they could just wander in there because there's no coded lock, too.
@Arkandel You pretty much nailed one of the other things that I actually write down, because people will absolutely insist that because there wasn't a rule about their uniquely concocted asshattery, they can't be punished. (Generally, they will already have a reason this is not asshattery, whether they're playing innocent or are actually genuinely clueless, and that it's the other person who is not 'being an adult' because they're objecting to the behavior.) That's the 'if new policy has to go into place because of something you did, it was either horrible enough we never thought anyone would think it's OK to be that big an asshole without penalty, or it was a genuine blind spot no one realized would cause a problem before now'. The latter is massively rare, and it's usually easy to spot the difference.
Back on TR, the Firan flood brought in some folks totally unaccustomed to the different culture on the game. There was a player that, gods help me, she was the bane of my existence because she was genuinely clueless, and not deliberately obtuse, but she had no understanding of the cultural norms of the game and was very aggressive if they were pointed out to her by fellow players. This understandably caused immediate conflict and escalation that never needed to happen.
For instance, she believed that it was entirely kosher to wander into any of the occupied temp rooms without invitation, or a word at all OOC, and just plunk down and observe total strangers RPing as passive entertainment for herself. This actually is a thing in some places, and again. Some of it has to do with coded locks, but part of it has to do with the culture of passive observation being allowed. This sounds completely bonkers to a lot of people not familiar with it until you consider how many of us have run into an RP buddy 'just parking in the group hangout to watch the IC goings on of their RP circle and maybe chat a little OOC with buddies' while at work, or 'I'll pop in and if I'm able to pose in I will but I may just hang out and maybe chat today if things are busy', which, to the outside observer or new player, looks like 'sure, obviously, hanging out and just watching people play is allowed, that guy's doing it!' (without realizing there's any understanding amongst those players, or plans to pose in later, or that they had to leave unexpectedly, etc.).
Most of us would have little issue with a buddy popping into a room and saying, "Hey, can I hang out here while y'all RP and chat a little OOC about the group's plans today while I'm at work?" (And they get a yes or no and life goes on.)
I suspect plenty of people would take issue with a total stranger OOCly meandering into their bedroom and plunking their ass down with a bucket of popcorn, without a word, waiting to be entertained.
Culture and expectations are super relevant in these cases. Now, that this player would go on the attack if her behavior was questioned or she was asked to leave/etc.? Not OK. She still had, gods help us all, reason to be confused, and from her perspective, other people were the ones being assholes to her by telling her to get the heck out of the room. (She was not the brightest bulb, but she was not being deliberately obtuse, either. I think at least a few hundred sparkly white hairs from that year are owed to her alone.)