My worst experience came just before the API disaster started. Someone posted on the ELI5 subreddit asking what autistic people experience when they are nonverbal. Now, I'm autistic and, while I'm verbal most of the time, I do have moments where I can't speak even though I want to. Typically in moments of high emotion or stress. (It feels like the words are in my brain, but the highway to my mouth has a twenty car pileup blocking all traffic.)
My comment was upvoted many times and many people replied positively to my comment. Then, suddenly, my comment was deleted. The mod said that because this was my personal experience, it was too subjective. Meaning, only an "objective" experience from someone who wasn't autistic would be allowed.
Needless to say, I was upset and needed to vent. I vented in the Autism subreddit about the situation and got people replying in support of me. Now, I did make a mistake where people started asking to see my original comment and I posted a screenshot. That was on me - especially because I forgot to blank out the original poster's name. (In my defense, I had nothing against the OP or their question so nothing lept to mind saying "better blank that out.")
The whole thread was suddenly deleted from the Autism subreddit for "doxing." I deleted the person's username and asked for the thread to be restored. Instead, I was given a 30 day ban. Then, I quickly got notified that I was permanently banned from ELI5 for "sh*t-stirring." My goal was never "raise an army of autistic people to attack the ELI5 mods," but just "blow off steam for something I felt wasn't just."
I decided not to contest either and just stop going to either sub. In fact, I was deciding to reevaluate my Reddit use altogether. And then the API debacle started.