As a huge fan of old school D&D, I have noticed an absurd amount of mentally ill people using D&D as a way to act out their depravity and twisted self-delusional fantasies. I have noticed it in the game store, among (ex)friends, and in many 5th edition communities.
The newest edition especially makes it easy for people to play overpowered furry hermaphrodites and there's a disgusting trend amongst modern players to demand roleplaying sexual depravity.
It's quite upsetting because I would like to just play a classic beer-n-pretzel hack'n'slash with minimal story, maximum murder, and no fucking queermoes trying to make me roleplay faggotry.
Im a particularly huge fan of Labyrinth Lord, supported the Advanced Labyrinth Lord kickstarter a few years ago and got my name in the credits. It's Basic/Expert D&D with Advanced D&D stuff converted for seamless use in one rulebook. Retroclones rock.