The latest example comes from Apple, who are apparently trying to sue HTC into submission. They've filed a complaint alleging a host of patent violations, and it's possible that it's even true, but my sympathy for Apple is less than nil. People often defend software patents as purely defensive in nature, but so far I have no evidence that that's true here: this is simply Apple trying to squash their competitors through legal means, or force them to knuckle under to secret licensing agreements. Even Microsoft is rarely quite *this* blatant.
(Yes, I'm pissed off. I happen to be fond of the Android platform, and that appears to be what Apple is trying to indirectly crush here, by going after its primary manufacturer...)