Those who don't do as they're told.
I'm not going to defend this idiot or many of the people involved, but let's be honest about the reason why this site was taken down and not others. Megaupload had copyright material being pirated over it (just like every other online repository of files), but took it's time taking it down. if they got a request, the material did disappear, but not very quickly. Other sites were quicker at it. So, they were considered to be beligerant and this caused the takedown. Others are considered to be 'co-operating'.
So, this is nothing to with whether material is being pirated through the website and everything to do with if you do what the USA says. Youtube does what it's told. So do some of the others. They actively try to help the USA. Other sort of go along in a slow sort of manner. That's the difference between being taken down or not.
So, over time, sites will simply move away from countries like the USA and now NZ and Aus as they have done what their master (USA) says. They will be hosted in places unreachable by the USA. The more the USA does it, the more business they will loose. Eventually, the USA will become a place where it's too difficult to do anything at all. They will loose in the end. It will take years, but it'll happen.
I'm not defending pirating, but simply saying you don't cut off your nose to spite your face. Sometime, someone has to acknowledge the issues and problems around Hollywood and the music companies and deal with them. Eventually, someone will realise that no matter how compliant the population seems to be and no matter how much they seem to dance to your tune, there is a line. There are so many examples around the world of what happens when that line is crossed.