MegaUpload, Kim Dotcom, BitTorrent and Usenet - How are they all connected?

Boost forward to this year, 2012, and MegaUpload founder, and Call of Duty: Modern Warfare 3 pro-gamer, Kim Dotcom, is arrested, by U.S. authorities for his file sharing website. Now, just think about this for a minute... Kim Dotcom (a German citizen), and MegaUpload (a Hong Kong company) are currently being prosecuted under U.S. law. The F.B.I. with the cooperation of local authorities took Dotcom, and many others, into their hands.

How does this happen? The U.S. has that much power they can just jump in and arrest anyone whenever they like? Are they telling me, you, and the rest of the world, that they only just found out about MegaUpload? What about the hundreds, if not thousands, of other similar, or better file sharing websites, programs or servers?

How does Usenet stay afloat? How does the entire BitTorrent network stay afloat? Ask yourself those questions.

I can type in any movie, TV show, game, song, program, book, you name it, into Google and there will be millions upon millions of links to websites. Even a novice Internet user could find something to download, easily. What is on those websites? Spam. Loads of it.

Go up a level and you'll find peer-to-peer file sharing like BitTorrent, which is a huge upgrade upon spam-ridden websites. BitTorrent, however, uses open ports through your modem, and then to your PC (or NAS, etc) to download said files, music, movies, etc to your PC/device. Again, you'd have to be ignorant to not believe that the NSA, FBI, CIA, and other acronym-filled companies don't know about these things.

Up again and we have FTP, a much more secure source of file sharing. FTP has been around about as long as the Internet itself and offers complicated file sharing, that is still easy to fiddle with and once you've become familiar with it, just as easy as anything else. With FTP, you need to know where to go, or have a hook up or three.

Usenet is the Grand Daddy. Retention of its wares is 1200+ days, which means it holds files for over 3 years. Just try to imagine the near-limitless files available, at full-speed, 24/7, from anywhere in the world, at the touch of a button.

Why aren't they being targeted? Why was it just MegaUpload? Why? I cannot think of a concrete reason to why MegaUpload, and not other, bigger sites, was taken down. Was there something on MegaUpload someone didn't want the world to see? Did someone with influence pull a few strings and a 'story' was created. Did this story allow the various legal proceedings to happen and give the FBI a case to build?

There are some serious questions that need to be answered, because what has happened just does not make any sense whatsoever.