That kind of stuff is on RP realms where people will study the lore/quests in the game in order to role play their character in interaction with other players. RP realms are also where the ERP and Furries guilds exist.....now if want to see weird go seek out a furries guild on a RP realm if you can find one, they are usually low key about it since blizzard allegedly disbanded and banned a good number a couple years back who were openly recruiting in game and through online forums.

Most players play on NORMAL or PVP realms and interact the same as people here do in party, whisper and guild chat. You might look specifically for an adult guild with age requirements of 18/21 years old and on for membership to lessen the crap.