Imo the single biggest cause of piracy is the downward trend in quality of games and films a like. New games with new ideas and truly new content, draw interest and sell. Just look at the success of Dragon Age & Mass Effect, in a time when many developers seemed to have written off the whole concept of "single player" and "RPG".
Game wise. I think part of the problem is many people object to buying XYZ "2". Often these games havent really got a new story, have no new mechanics, havent even really got a graphics update, and you as the buyer are left paying 30-50 Pounds for what is, essentially, a map pack.
Splinter Cell is a great example of this. Not so much the last one (conviction) but the console only one was dire. Its "new" feature was multiplayer, it was effectively carried on the continuing plot, and wasnt nearly long enough to justify the stupid console games cost levied on everyone these days. That wasn't even that good. I dont mind paying for a map pack, as long as its PRICED like a map pack. And I dont mean this £20 COD4:2 map pack crap which is a joke (I hate them for ruining the PC moding community enough for this as is but thats a different story).
The problem is similar in films, overhyped, over paid, films that cost £6-£12 to spend 2 hours watching plus any transport costs (At my uni you need to catch a train there and back to go to the cinema). I dont mind paying a tenner or whatever to see a good film. But tbh, I can feed myself for a week on what it costs me to go to the cinema once. Then I look at crap like the expendables and ask myself do I REALLY wana spend a weeks food on this? I remember when this wasn't a problem. Generally you could rely on films at the cinema being "good" even if they weren't to your taste. But some much money and so many sheep line up to see bad films (read Twilight which pushed Prince of Persia out of all the cinemas near me after just 3 weeks of release before I had the opportunity to see it >.<) that you can garentee what you pay for will be good.
The final note on films I think has to go to the bracketed section in the last paragraph. Film leave cinemas to soon. I was DYING to see "The Sorcerer's Apprentice" I like Nicolas Cage as an actor. I think he does outlandish things very well, I'm a fantasy fan and it appeals to me immensity. RL circumstances have dictated that up till now I have been unable to go to see it. I've got some free time on an evening over today(yesterday now) and er....today, now. If I want to see The Sorcerer's Apprentice I have 2 choices, remember it has been out only 2 weeks and 2 days in the UK, I can go at 10:30am, which I physically cant. Or I have to go to central London to a cinema some 60 miles away in the biggest city in the bloody country at one of the biggest cinemas, and even THAT is only on a Wednesday. ITS BEEN OUT TWO WEEKS AND I CANT SEE IT ON A WEEKEND AT A REASONABLE BLOODY TIME!
This, I think is the biggest reason to pirate a film. Its the cinemas fault. If I wana see that before the DVD release it is my only realistic option now. In truth I have little doubt this will end up in my DVD collection. BUT I WANA SEE IT NOW DAMN IT! Id have WILLING PAID to see it and they have taken that choice from me because of The Expendables and The Switch >.< I dont think 2 weeks it too long to ask to keep a bloody film up!
The REAL joke is, if I wanted to, Avatar (The CG fest not the crappy airbender, yeah THAT Avatar, you know, the one which was released on the 17th Dec 2009!) at 7:30 on an evening EVERY DAY! TS 3 is still on at a good time which has now been out 6 weeks. Dinner For Schmucks, which could only have been better if it was never made, 20:30 every day, even Marmaduke, which was never even officially release in the UK as far as I can tell has better showing times than The Sorcerer's Apprentice (13:45 every day).
Its a JOKE!