The user with the 188.8.131.52 IP address has been deleting and falsifying information. On each of these, he puts "Kamond" in the edit summary, so I suspect he's doing this to spam that word. He's been doing this for over a year on at least six wikis and doesn't appear that he's going to stop. I recommend a block of at least six months.
If you need help figuring out what kind of rangeblock to use to cover the various IP addresses he's edited from, I can supply that.
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