alt Hacker NewsThrowaway accounts using "clever" turns of phrase can often be anonymized by double click, right-clicking -> googling their witty pun and seeing their the sole instance elsewhere, on Twitter, Facebook, etc
If I see a couple words I dont know in a row, I can infer a posters real name.
Id be more specific but any example is doxxing, literally so
I assume one's vocabulary is basically a fingerprint, even if one doesn't use unique turns of phrase. Domain knowledge just leaks in and we aren't conscious of it being identifiable.