#i'm in a discord server that is semi-private where users are enthusiastically encouraged to post about their special interests

[elaienar]

The OP's list covers a bunch of things we don't do in public spaces because they're public spaces and we're around strangers who don't want to hear it.

Trauma/illness/etc. and sex are deeply personal subjects that many people prefer to only engage with in private, with people they feel safe with. Playful rudeness and criticism can really easily cause hurt feelings and so again, people often prefer to keep this to relationships with people they already feel safe and comfortable with. Listening to someone talk about something that interests only them is a timesink and something people do for people they want to sink time into. In summary the list consists of things that many people only want to talk about with their friends, not with strangers.

Obligatory disclaimer that all of this will vary from person to person, and some people will feel completely differently, and that's not something that needs to be criticised. But it's broadly true of enough people that you can safely start off interactions with internet strangers by assuming that their answer to "Would you like to hear about my trauma/sexual experiences or be insulted/criticised?" would be "No thanks, we are not that friendly yet."

there are no hard rules for human interaction but honestly i think everyone online would benefit hugely from operating under the assumption that, unless you have been given a specific reason to think otherwise in discrete instances, internet strangers do not want to be approached with:

your trauma, illnesses, or deep-rooted self worth issues

any come-ons or sexual content

over-familiar playful rudeness

information about your dnd characters/ocs

disagreements with their harmless subjective opinions

if it is your first time speaking with someone i can not highly enough recommend that these do not be your opening topics