it's legit just a manners thing, that's all. a lot of people think it makes the game less fun so they shame abusing caps when cthulhu'd.

It's not actually cheating and it's not like you're going to get a vio for it, especially since Cthulhu is only used in unranked for the most part. People just consider it poor play to let someone who visits Cthulhu instantly out who they visited since that kind of makes playing as the role impossible.