Yes that was me (I think). I can assure you that I am not reputation farming, or just editing every question for no reason.
I do a lot of retags, editing questions just to keep the tags clean. So it can look like I'm not editing the question, and in some cases I'm not changing any of the text in the question, just the tags.
About getting reputation:
Any user with over 1000 reputation does not get any reputation for editing questions. If a user has less then 1000 reputation then (as gandal3 mentioned) the edits go through a review process, and if they are useless then they would not be approved.
If you see some suspicious edits, ask a question in the chat, or here on the meta.