This says that a company CANNOT block the sale of software. And that once you've purchased it, they lose the right to control it. Steam even changed their rules on reselling games because of it [Only in the EU, IIRC.]
There's also another court decision, which I can't find, what says that EULAs aren't legally binding. So they can't even get you that way. But, that may be US only.
So it follows logically, that this and this would be illegal in the EU, along with a lot