WOTLK without RDF isn't WOTLK

Here you go
https://www.reddit.com/r/wownoob/comments/eq0xis/toxic_players_in_dungeons/

https://www.reddit.com/r/wow/comments/vpl36p/levelling_up_in_dungeons_and_the_toxicity_is_real/
https://www.reddit.com/r/wow/comments/wbvn96/whats_with_the_hostility_towards_returning/

Need more? Heres a game that was built with an RDF system in place.