Legality of downloading with torrents
As with any downloading technology, you should not download copyrighted materials such as software, mp3, movies and so on. If you do not have the licence for it, it is illegal. There is an additional problem with torrents - in certain countries "only downloading" movies and mp3s is legal, however when downloading with torrents you also share (upload) your downloaded part - and that is not legal anywhere (you are distributing copyrighted material which you do not have a licence to).
Of course, torrents themselves and all around them is nothing illegal, until you download materials you shouldn't. Torrents are also used for fully legal distribution of certain data ( for example demo versions, trials and so on).
