I will also add in one I was just thinking about. While groups like SCA and SLP are fine and all, one RP pet peeve is when guard guilds try to enforce their non lore laws and rules that don’t actually exist in any canon into real RP.
Many guards that hang out, outside the building north of the cathedral are SCA I believe, the guilds “Stormwind City guard”. I love those guys totally as they are normally super cool, but my big issue is them “making arrests” or telling people not of the RP group made up laws that have no precedent in WoW. Like them having the scarlet flame be legal, or scarlet redemptionists being allowed within Stormwind. I believe they try to push too far with their RP when their material has no substance to lore.