Leave it to the Russians. A site called You Have Downloaded seems to keep track of all those torrents of which you seem so fond. Unless you were using some kind of proxy or otherwise know how to obfuscate your true identity, everything you downloaded could be in full view of…well, everyone.
When Torrent Freak investigated, You Have Downloaded had information on 51 million users and 103,000 torrents.
Why not entertain yourself to see if someone has been, er, keeping tabs on you?