Is it ethical to edit other people's bot/user pages?

For the most part, I think it's fine to edit almost anything on the wiki, particularly if your goal is to improve the wiki and make it more useful to more people. I've migrated/edited lots of such pages. Cigaret and Ascendant are both pages I migrated where I tried to preserve the author's text while also updating inaccurate info and reformatting for the new wiki.

There are a few things I'd consider rude though:

• Major changes to something like User:Chase-san/NewTech.
• On Diamond, editing the ranks in "How competitive" seems fine, but modifying "What's special about it" would seem rude.
• Any major changes to a bot/user page for a user that's active - I'd just say you should discuss it on the talk page first.