The discussions on that thread pretty much cover it. DRM and media corporations' current practices seems to encourage piracy, even in those that'd prefer to stay on the straight and narrow.
I sometimes meet retirees and old academics that want to know the best ways to get hold of pirated media now! My guess is that they've tried or have read/heard about the legitimate/legal ways and are unhappy about them.
It's a bit like when Apple Inc. demanded that Google change its search algorithms because iTunes' products weren't showing up near the top of search results. The difference here is that the media corporations want *everyone* to change their behaviour to suit their current restrictive and inconvenient practices.
Piracy isn't their problem. The problem is that they're getting boycotted by a lot of would be customers.