An interesting thing is, how the hell is this going to work if both players are behind the same nat and thus share the same external ip address.
But this works fine on WoW, I think blizzard can handle this situation.
Same - recording data-only to the disk, and the error correction worked OK there.
And it's not a problem when that happens. The blank section is error-corrected around, and the disc works fine.
Here's one I did, with a huge oily fingerprint purposely put on a DVD before recording, it was burned, and the 'shadow' of the fingerprint shows up as a huge unburnt patch after the original print has been wiped off.
The disc worked fine afterwards, and worked fine for quite a while until I lost it.
Time is nature's way of making sure that everything doesn't happen at once. Space is nature's way of making sure that everything doesn't happen to you.