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Okay, , I think I've read everything relevant. No, I do not think you were too harsh. Some of his edits have been a bit uncontructive and the ""Aneditor"" deception was exactly what it looked like, deception. 

If you are worried, you can always play it safe in the future by being deliberately less harsh, and then seeing what the response is. That keeps the options open just like vandal warning levels do. It gives the recipient a chance to see where things are headed and the onus is on them to correct. If they don't, you will have been patient and have given due warnings. Further, being more harsh than appropriate  means you've done something wrong, and you cannot easily go backward from that. However, if you are under harsh, you can always go the next step if needed.

While we are on the topic of this editor, could you do a copyvio check for me? I can't access the .fr site.  Cheers,   "