lol this is really old news ......if they need to catch you it will take them only few seconds to find out what you doing within your internet .They can track down your every downloads easily . They just don't care until some movie production company decides to bust your ass and send legal notice to your isp regarding certain movies . ISP will be forced to check which IP's have been downloading those movies .

They will usually send your first warning letter ....and second thing they will do is cut off your net and you will need to find another ISP lol . PM me if you want to know how this works cause i have been through this issue already due to some dumbass who shared apartment with me .

Remember don't use those random public trackers that you can easily download torrents from to stay on safe side you need to find some Private trackers which is hard to get in like : http://www.torrentavi.com/general-torrent-news/top-10-hottest-private-torrent-trackers-of-2010