Tumblr is a cult.
They drag in young, insecure people that don’t know what to make of themselves, and they validate all their retarded ideas and tell them that they should distance themselves from everyone that isn’t part of the cult.
e.g. “You’re 13 and not all that interested in girls? You must be ASEXUAL just like us!”
But like in all cults, once you’re inside you better watch your fucking step. Conduct is strictly policed, and any attempts to question the group-think are swiftly and severely punished.
Hugboxing is the mechanism that Tumblr communities use to draw their victims into the cult, but it only extends so far, and if you transgress then they’ll cut you off hard.