This has been my movie decision flowchart for the past while:

Right now, I own a total of 1 movie that I made an exception to this chart. I apply this to games and movies as well. Though, I have a lack of games so another exception was made on Christmas
While entertainment isn’t a big enough sacrifice to be worth complaining about (first-world problems), I wonder whether refusing to buy something that is only available on DRM can justify pirating it since the creators won’t be seeing your money anyways. And personally, the amount of garbage put into most DVD movies (FBI warnings, trailers that you cannot skip, more threats of impending lawsuits) is almost tempting enough to download it just to stick it to the man.
I do rent movies. Most or all of them have DRM, so I might not be making a difference at all