I had an ex partner get upset because I used a period at the end of an innocuous text. This is among the reasons why they are my least favorite ex. Just a mess of anxiety and arrogance, where they'd worry about bullshit but be completely convinced that they were right and their way of thinking about things was the only sensible way.
Unfortunately they're still distantly connected to the friend group, but luckily I haven't run into them in years.
I did a lot of stupid stuff as a teenager but most of it is forgotten.
Someone tricked me into stealing my unique gloves in diablo2 once. Felt real stupid after but they just blocked me and I never saw them again. (I think it was that if you die when the item was being moved it drops onto the ground, so they told me to swap my gloves in a pvp fight and then killed me)