According to Malicious Mandy's site (which usually has viable twilight info), an Argentinean fan believed connected to the infamous Breaking Dawn leaked images/video is to be prosecuted by Summit Ent. After just having a super fun time at San Diego Comic Con this year where Summit provided fun goodies and surprises for their fans, I find it difficult to believe that they would turn their backs on one.
In my opinion, like it or not all twilight fans make Summit money. period. Was it wrong to obtain these images illegally? Sure. But is making an example out of one fan going to help or hurt Summit's cause? I vote for the latter. It was the passionate dedicated fans that brought in your box office numbers in 2008 that promoted your fledgling studio into phenomenal success. If not for Twilight, Summit would be in the position they are in making movie after movie from the recent Source Code to the upcoming 50/50 and Three Musketeers.
Should there be some consequences? If so, how severe? What's your opinion?
Bottom Line, it was wrong and should not have happend. Will it cost Summit, no. It would most likely generate more interest in the upcoming movie and make them more money in the end. That is if they don't squander the resulting profits of the leak by legal action against a fan.
My advice to Summit would be to choose your next moves carefully. You do NOT want to piss off your fans, especially not TwiFans ;)