They started cracking down on this a bit, actually. They do that "Genuine Advantage" thing for windows, something that scans your system and if for whatever random reason (and I do mean random reason) they think that it isn't a "secure" copy of windows, or something that was illegally obtained, you have to go through a friendly 3,000 step program to allow you to get updates, many of which include saying "No, this is a real copy, I'm not spending 400 dollars again."
I had to do that for work. It sucked.
Today's Penny Arcade does a pretty good job of summing up this topic: