There is no such thing as anonymity. With the number of bits required to ID a person and the fact that you are leaking such bits all the time you can simply forget about anonymity.
Many people online seem to think that they are anonymous and so were emboldened to do stuff that they might not have done if they had realized this. They continued to feel extremely good at this right up until the knock on the door.
> realized
Most UK and Australian writers would spell it "realised" so there's a bit right there.
Even if you include no personal information, there is information in writing style.
Stylometry is the study of this. Yes, there's also adversarial stylometry - distorting your writing style to fool an analysis. It's probably effective now, but that could change overnight and every archived post that every OSINT organisation has collected is deanomynised.
Yeah you can say "I change my style". But there's some bits that don't have false positives. If I EVER say "praise the omminsiah" I'm definetly au fait in 40k memes. If I ever say au fait I'm a person who has at least a rough idea of what it means. There's no false positive here, so if you can just find about 29 undeniable uncorrelated bits that are known to not have false positives ... a more advanced analysis could exploit this in a more continuous way (e.g. the likelihood of it being a false positive). I should shut up now.
Well there's anonymity from authorities, and there's anonymity from garden variety lunatics.
There exists a grey area between not getting away with nefarious activities, and not having your life ruined by a lynch mob because you didn't approve their preferred CoC on a hobby project or some other perceived injustice.
Stop with that doom and gloom. You can absolutely be anonymous online if you want to and have some basic technical knowledge (every HN reader does).
I could try to prove it to you, but the only proof you need is that cybercrime exists and millions (or tens of millions) of dollars are stolen every day. If anonymity didn't exist it would be easy to stop this, wouldn't it?