How do you figure they deserve any cash from the second hand market? No other industry gets money from the used product market, how in the hell do the game publishers rate special treatment? Not only does it defy logic, it also goes against the traditional view of the used market. Namely, I bought it, I get to sell it if I want, boo-hoo if you don't like it. They already got what they deserved, legally and morally. They got their money from the initial, new sale, and that's all they should get.
It's pretty clear that this move has nothing to do with piracy, and everything to do with fighting the used game market. On that topic, I have no sympathy for the publishers, I'm pretty tired of hearing them cry like babies over the legal uses of the capitalist system. Somebody give them a frakkin' pacifier already!
Fortunately for me, all that they are keeping out is the multiplayer, and that's about as unimportant to me as is possible.