Personally i would have sent a message to him saying that i know what his scam is and that i would report him to ebay/logitech/authorities if he carried on doing it.
Dont get me wrong im not some chav scrote who thinks stealing is funny i would have just given him a chance to stop, going straight to logitech (with the hope of getting freebies) would be a last resort, i wouldnt want to ruin his life if they do decide to go after him and he could get prison time.
Interesting comment, but that's not what I asked you.

I asked you what do you propose happens to "him" [now that he's been found out]?