This is not an exhaustive list, nor contains everything. Read between the lines with broader topics. If you have to think about whether or not you fall into any category on this list, you probably do. I block liberally for whatever reason I deem fit even if it's not for reasons on this list. In general, just use common sense. I do not owe you 'niceties' if I have communicated boundaries to you, and you continue to break them after I have told you multiple times to stop. There are a good handful of things that I consider "DNI" criteria that are not listed on here as well, keep this in mind.
——⠀⠀Under 18
Larger discord servers where public interaction is nigh unavoidable is exempt from this. Additionally, I will not accept DMs or friend requests from anyone who is under eighteen.
——⠀⠀Racist
Believe in reverse racism, appropriate (closed) cultures, tell POC to change their cultural names for ANY reason, race fetishizers, &c.
——⠀⠀Anti-lgbtq+
Ace & MOGAI exclusionists, TERFs, radical inclusionist, support trans ID labels, believe any paraphilia is a "sexuality", anti good-faith labels.
——⠀⠀Ableist
Endogenic "systems" and their supporters, use mental illness as adjectives, demonize / stigmatize / fetishize any disorder, believe in 'narc abuse' when in reference to pw/NPD, believe in "Delusional Attachments" or "IRLs".
——⠀⠀Extremists
Political extremists (more notably: far right-wingers and trump supporters), religious extremists (more notably: Christians or Catholics).
——⠀⠀You Don't respect The Three Laws of Fandom
It's not up to you to decide what other people are allowed to like or not like, to create or not to create. That's censorship. Don't do it. There's enough of that bullshit going on right now.