I was thinking the same thing, I also had a hunch a long time ago that if your game is not online enabled they might take notice to it as well. Personally I use a copy of face racers because it was cheap and online enabled
I am 100% sure the header was applied correctly. I checked his system a few minutes ago, and I do it enough to be able to get the info in a heartbeat... Seeing as how I rent my games and apply those headers to my ROM's, and I have DOZENS of ROM's. I also go online with them pretty much constantly.
The only games he played online was MH4U and MK7.
He applied his private OOT header to both of them, and those are the ONLY games he went online with.
He bought his OOT from eBay. He says it was listed as "new", but a few games I bought from there as new (on auction for dirt cheap) were just shrink wrapped and obviously used.