So back in freshman year of high school, maybe it was 2013? I decided to join my school's Gay Straight Alliance Club because I had no friends and figured that'd be somewhere to start.
Before she joined it was a pretty normal club, couple gay guys, few bisexual chicks, one girl who said she was asexual, a couple kids who joined as allies because of unsupporting parents, nobody was really into the socjus way of thinking. Mostly we would eat lunch together and talk about what games we were playing.
Enter That Chick: at the time she was identifying as some kind of genderfluid softboi, wearing cosplay wigs to school, changing her name and pronouns daily, and with a wicked fear of deodorant. Her entire neon hair mafia came along with her.
She went full fucking throttle right away, she would stand in the doorway and demand your reason for being there, your gender, and your pronouns. If you weren't ready to come out or couldn't she would throw a number of insults your way and make you leave. Stage two was any gay male, because they weren't oppressed enough to need the school's only safe space. I left school during that because I was in the hospital so I only know the rest from secondhand accounts, but apparently all the original club members were forced out until there were only proto-otherkins and genderspecials.
Tldr: tumblrkind alienates actual lgbt teens and forces them to leave the only safe space in a high school.