in our house we have a few categories of stimming behavior.
1. the no category. this is for things that are unsafe. hurting self (head banging, scratching), hurting others, chewing on choking hazards. i know this is excluded in OP’s post, but i’m putting it on my list because if you parent an autistic child and deal with this, you have to be aware that a key to off-limits stimming is redirection. stimming satisfies an important physical and neurological need for the autistic brain, and that behavior is sensory-seeking. if you must say no, please also offer options or help redirecting to appropriate outlets for pressure, motion, rhythm, chewing, etc.
2. the shared space category. listen, i get that a lot of people are assholes about things that aren’t hurting them. that’s not what this category is for. but we have a household with multiple autistic individuals and a work from home situation. “shared space” is the code phrase we use for “please take this stimming to a different location.” sometimes, aural stims like repetitive noises or physical stims like pacing can be legitimately distracting to other people in a room (or car!). in the case of other autistic people, it might even feel painful or mentally consuming. this category is no-judgment “please move to another location to continue stimming this way.” it’s not bad, it’s not wrong, you aren’t being shamed– just do your best to respect others and their needs or comfort, and leave the communal area or lower your volume.
3. the you do you category. it doesn’t matter that nobody else is doing this to feel comfortable or happy– you aren’t hurting anyone else, you aren’t being disruptive in a space other people are using together. go for it.
and in every single category, anger has no place in redirecting a stim. not even the no category. stimming isn’t malicious, there’s no actual moral requirement to be “less weird” or “like everyone else.” even reminders like “you aren’t the only person in this room and that’s very loud” don’t need anger. stims aren’t done at anyone. they’re just the body expressing a kind of neurological hunger, and whether the answer is “enjoy that!” or “this isn’t safe for you to eat (ie, do)” fury doesn’t help.