Just the basics, do not interact if you('re):

• racist, anti-blm, all/blue lives matter
• nazi or alt-right
• antisemitic, islamophobic
• xenophobic
• a nontraumagenic 'system'/'endo' (or if you actively support them)
• you fakeclaim systems without any reasons (it can be really harmful so just don't)
• map (minor attracted person, so basically pedophile), or a supporter/neutral
• ableist
• against self-diagnosis
• queerphobic/lgbtphobic (homophobic, transphobic etc.)
• use slurs you can't reclaim
• proship (believe fiction doesn't affect reality/support problematic ships because of that)
• believe introjects are their source (this is not true and it can be incredible harmful to say they're the same)
• poppytwt in general