Why is the tumblr rationalist community filled with "help vampires", people who suck up immense amounts of time and effort from people with actual skills without offering any real value in return?
http://www.skidmore.edu/~pdwyer/e/eoc/help_vampire.htm
like, just off the top of my head:
Ozy
Olivia Schaefer
"thebiggerfish" aka Sylvia
Act/Accalia

How do we stop this menace and either force them to improve or oust them from spaces where they can continue to hurt people/waste the rest of our time?