Aver: But it looks like tactics of Sheriff of Nottingham works. See how many filesharing services changed their business model or decided to stop their business activity. Even few torrent sites decided to shut down their sites. And all of this because of Megaupload shut down.
I'm not saying it's good or not. Just saying that fear works too.
And I'm sure that will put a major dent in piracy just like shutting down Napster did back in the day. Wait, that's not what happened at all. The preferred methods of piracy have changed over the years, balancing accessibility and decentralization depending on the technologies available and the legal tactics current in vogue, but these shifts in methods have had little effect on the occurrence of piracy itself. Torrents are still around and going strong, and these days are even further decentralized in that some types don't even require trackers anymore. There are also an increasing number of private trackers and darknets as well. And even sneakernet seems to be making a bit of a resurgence (it made me chuckle a bit when I recently saw my 65 year old mother passing around burned software and music CDs within her circle of friends).
And aside from being utterly ineffective at stopping piracy or increasing sales (note these are two different things), such heavy-handed tactics destroy one of the few things that's actually effective in convincing people to buy: goodwill. Companies that establish a rapport with their potential customers and foster an atmosphere of goodwill have a much easier time of convincing those potential customers to become real customers. Pissing away that goodwill by getting behind heavy-handed legal tactics and engaging in rhetoric to try to scare people is one of the worst things a company can do.
Aside from fostering goodwill, the other thing that as been quite effective in decreasing piracy and increasing sales has been making easy, affordable alternatives to piracy available. iTunes, Amazon mp3, Spotify, etc, have all been tremendously effective in re-acquiring customers for the music industry, and Netflix and Redbox have been similarly effective for movies. Ironically, these kinds of services (especially the latter two) seem to continuously be targeted for destruction by the very industries that they're helping (who seem to think that if they could just get rid of these easy, cheap services people would line up in droves to jump through hoops and pay much higher prices for their products.... idiots). And coming back to Megaupload, many artists (especially rap and hiphop artists) used Megaupload to distribute some of their own works as a way of advertising to their fans; so not only will the shutdown of Megaupload do nothing to affect the occurrence of piracy, but it also removed a tool that many artists were using to successfully promote themselves and their music (of course, the likes of the RIAA were all for this, as they seem to hate any distribution channels outside of their control, which could give artists the ability to avoid them and their abusive contracts).
Ultimately, legal tactics have time and again proved utterly ineffective at fighting piracy and improving sales, and often are actually detrimental to those goals. To reduce piracy and to increase sales (again, two different things) what's needed is affordable, easy to use methods of legally acquiring content, fostering an atmosphere of goodwill with potential customers, and on a larger scale convincing the public at large that copyright is a benefit to them so that they'll buy into it (this would require a massive overall of copyright laws, so I'm not holding out much hope for this one).