At this exact moment there are at least 4 active accounts of this same user. He collected 14 blocks. He is well know in Wikipedia as well where he collected 5 warnings and 2 blocks with the following motive: “Edit war, personal attacks, uncooperative attitude”.
It’s crazy the amount of time ONE single user can waste on a community/DWG. I think at other cases such as the Greece vandal: here
Time to revert, fix, look for fake accounts. It takes all the fun of the mapping out. I wonder if the current sistema is fitting the increasing number of users in OSM, or if we should re-think it (as someone suggest already in the past, as in here).
Seems to me that the current schema benefits this kind of users. Just create new accounts and keep editing as you want, at a certain point the other person will stop reporting you and that’s all.