Well, i did unfriend him for a similar circumstance. At the beginning i got a couple of invites. Sudently one of them disappeared and there was a Mourinho in my friend list. So happens that there was a Mourinho in my league, with a team named Chelsea, so i thought the guy had changed his name, or something though it seamed to be a different team, as the team emblems were different. I thought it was someone with another account named after the real guy, or some kind of bug, and decided to unfriend him.

Only latter i read the announcement on Nordeus' website. Too late.