The most recent was someone who went in and removed use of the word “you” as an attempt to “depersonalize” the answer. There was some kind of recognizable idea behind the edits, but the user’s changes mostly just damaged the readability and made the answers more convoluted.
The editor argued with me and linked to a meta post—which they wrote! This was a multi-page essay which explains, in depth, the rationale for these awful edits.
The user argued that “you” is not used in good, professional documentation. This is, as far as I can tell, completely false and within seconds of pulling up various samples of good documentation I was able to find dozens of examples of “you”.
Another user, years ago, would start fights and argue with anyone, saying that “standard C” only referred to the current C standard, and any previous editions of C were no longer “standard”. The user would insist upon removing the C tag from any question about C90, for example.
The more you answer or ask questions, the more likely it is that you get into conflict with one of these horrible, horrible users.