Blizzard now claims full copyright for player-made “custom game” mods

Uh huh.

That's a really good way to ensure that a movement to boycott any of your products gets off the ground. Also yet another page in the saga of how businesses are trying to utilize legal asymmetry to dwindle consumers and creative's out of their rights through draconian contract terms with no process for a good-faith "meeting of the minds" by two individuals of "equal-standing" to actually hash something out.

In fact, this type of thing has widespread repercussions for affecting the way in which two parties come together to do casual business.

For heaven sake, one is buying a game, not getting married. Should a business Start being that dictating abusive terms to that degree and I'd make sure I become an extremely vocal figure against doing business with said business to anyone who'll listen, and I hope others who understand the ramifications and what is at stake will do the same.

Great motivation to generate content for them and their community of players, there. How long before they're seekritly employing modders to generate stuff pseudonymously in hopes of generating a community? (Hint: that doesn't work and its obvious and offputting)