It is funny - or sad, you name it - that the movie is set in London and the villain is a hedge-fund manager. The excesses of the City certainly contributed to this image of London being an over-priced place where traders spend their humongous bonuses over-paying for things. Unfortunately, I don't think that the crisis will improve the city's image. Large bonuses will always be around, on top of London being a magnet for rich people that don't want to go to NY.
More interesting is the bad publicity received by short-sellers during this crisis, which definitely contributed to evil character in the movie using it. Academics (humbly including myself) have shown that short-selling is usually a good thing to markets, even naked short-selling.
However, most investors see it as an unlawful way to make money. People never complain when manipulation drives prices up and short-sellers help to bring them down by bringing information to the markets. Neither they complain about the huge liquidity that short-selles bring to the market (about 30% of total) when they need to sell their holdings. Liquidity that decreased a lot during the SEC ban on short-selling right after Lehman's bankruptcy.
I guess it has to do with the behavioral argument that people hate to talk about negative events... Specially the bad CEOs that blame short-seller for their falling sharing place when it is really ccaused by their own poor management.