i must've been too entertaining with my other posts and you did not fully read what i said... i'll expand on this a bit.....
if that file had a watermark.... doubtful as this is fairly new but growing fast..... you don't have to share at all.... you simply need to play the file on that computer while it's connected to the internet... it then sends a signal that you've got an illegal copy of that file on your computer.... don't worry about logs and shit anymore my friend these guys are much more advanced than that..... it's not just cookies and logs on the internet anymore.... oh and here's something else to dwell on..... once that watermarked file gets played and they receive your info on your comp and connection they then scan your computer at regular intervals for any illegal files that you may have..... it is debatable whether or not this is legal but that's for the future and the courts to decide....