DRM really winds me up. I buy a DVD, then every time I watch it, I have to sit through a sermon about how I shouldn't buy pirate copies. But I didn't do that - I bought the bl**dy thing!
Not only is this shoddy targeting, but it's counter-productive - because I don't want to sit through the lecture, I've sought out software to enable me to re-author the DVD without the preachy bit. I keep the original DVD in storage and watch the hacked copy.
So the rights management action pushed me - a reasonably law-abiding citizen - one step closer to piracy than would have happened if they just let me watch the film.