> I am saying that if you look at Wikipedia history you can find plenty of places where an anonymous user/occasional editor fixes a spelling mistake that was then reverted.

You're essentially refuting yourself by making the same claim again, and yet still without offering a single example of something you are claiming is rampant. If there are "plenty" of examples, it should be easy to link a few.

I'm skeptical, because I've made many small, always anonymous edits over the years, mostly correcting spelling mistakes and bad grammar. Most of these edits were even made from dynamic IPs - and yet none of them were reverted.