No, that's not that easy. Megaupload did not offer any illegal links to illegal material. That's the difficult part of this thing.

Only webpages that offered these links are officially "illegal", not the sharehoster himself. That's the reason why they exist. And now the FBI found a way to close them anyway.

That's really a difficult story with these services.

http://en.wikipedia.org/wiki/Megaupload
http://en.wikipedia.org/wiki/One-click_hosting#One-click_hosting