So you think they can track down EVERY SINGLE PERSON on the internet 
They go after the big fish dummy.
I don't think they can, I know they can, because any of the IT specialist can do it, because it is ridiculously easy. I have seen in the real life how this works, in fact we all have: You are too little child to remember this but there were this user squadfather which were throwing insults towards Derek Anthony, and Derek didn't like it, so he ask from his mate, the police to locate the idiot. And they did, and the rest is some of the finest getbig history. They pinpoint this ugly bastard in some fucking trailer park where this brat was living with his parents

After the big fish? Did you forget that they rule this world? They have billions of employees to put on this, so they can fish out all the little fish too. How do you think they get these torrent groups etc. in court? If you wake up some night from the container in the middle of the sea, think about this: Who knows you are missing, and who fucking cares
