Furries have a bad reputation for being the most homosexual and degenerate. I would say them because some of them fuck animals and then they combine it with baby diaper and you get cub porn.
ABDL is another because it’s adults in diapers playing baby.
Tranny/Sissy/Trap communities another really bad one, it’s pretty much coombrained maxed males that get off pretending to be women ((gender euphoria)) and you add grooming in there or both adults and children. More degenerate because they are actually actively pushing their grooming agenda into law. The ones that get the surgeries are body horror individuals that have rotting holes afterwards.
Bronies, just weird but not too many horror stories about them.