Sideburns for some reason were really frowned upon (this was in the 90's)
I know in some spanish congregations dancing latin music at weddings was also prohibited for a while (merengue/salsa) especially by cubans. I guess the way it was danced in cuba was alot closer body contact or something. I always found the spanish hall always had alot more rules and people didn't question it as much.
There was some talk about pokemons and demonism...haha...let's say japanese anime in general..It was an unspoken rule not to let your kids watch/buy the cards,etc