To reach the ends that I think digital angel is going for one wouldn't necessarily need a watermark or overlay, they'd just need an embedded serial number that corresponds to the IP address. This could be embedded in the code of the content. it doesn't HAVE to be visible to the naked eye and in turn it wouldn't overburden your server.
Then just download the rapidshare, torrent, or VLC the stolen stuff, cross check this # with your MA database and lock the user out of your MA AND all ccbill billed sites. (according to their fraud policy)
That's a hassle most ass-boys won't go through to get "thanks" on usenet, IRC or whatever douchebag hacker forum.
I don't know why anyone would think blocking out some people is not better than blocking out none. The basic premise is used all over, for instance, a DOOR does this. Sure the Juggernaught could knock it down, does that mean i should just leave the shit open? Nah.
