Red_Avatar: You know what the biggest weapon in the fight against piracy is? RESPECT. Make your customers respect you and like you, and they won't rob you. Shitting in their soup and pissing in their wine, which most publishers are doing these days, is not the right way to do things. TheJoe: It's much harder to reward someone for buying a movie than it is a game. With a game, we get support, updates, bonus bits and all sorts. For a movie, we get a movie.
For a DVD, we get a movie and a Making Of. Some commentary, some impossible to navigate menus etc. It's hard really to say "hey, you get more with our DVDs". Much harder than it is to say "hey, you get more with GOG.com".
You're absolutely right, though. Movie companies do have to make themselves respected, but without much more than good ouput it's really hard to do that. Craploads of bonus content for a two hour long epic just doesn't make much sense.
I really don't know how a movie company can reward you for buying their stuff. Closest they've got to that is giving you a pair of 3D glasses which are only good for the 3D version in the cinema. What else can you do? Free cups? Goodie bags? I really don't know.
At the same time, of course, it's harder to piss someone off with a movie than it is a game copy protection system.
It's easier than you might think: don't just make mainstream stuff but also cater to niches now and then. They take safe bets, go with movies that target large audiences while rarely really appealing to a single group strong enough, etc. That's why piracy is so easy - people are mostly non plussed about movies these days because they're so commercial and people equate commercialism with greed and consumerism instead of works of love.
I watched Lawrence of Arabia a week or two ago. I downloaded it since I had no idea whether I'd enjoy it. I LOVED it though and the movie was really excellent, made me look up all the history around it and I bought it immediately. I'd do the same with modern movies except almost none ever make me do this. Considering I pay $30 a month to watch movies on Prime, a series of movie channels (most of that money going to the movie industry), my conscience is clean about this (since I barely watch those channels at all - I mostly want to watch stuff at my own leisure). But modern movies ... they rarely make me go "wow, I want to buy this".
EDIT: just noticed Aningan saying more or less the same thing - shows we're right ;)