I'm not around as often as I used to be, and I'm rarely if ever on Meta to know if the subject has been raised, but...
My belief is that accounts are attempting to game the edit privilege for rep, and lately I'm seeing people attempt to revert to the original content. The latest one I experienced, the English was barely comprehensible (no offense to the OP; I try to tread lightly when dealing with obvious ESL).
I've seen accounts combing for simple typos, like "fnction" and "funtcion" but leaving everything else. And there's someone who distinctly does not like contractions...
Is it time to remove the rep incentive for editing when performed by those who benefit from it? I'm trying to add a comment to politely tell the user to be more judicious when editing, because it is a privilege. Unless it's a ploy to attract registered users, because it's seldom anonymous edits that I see...