Fake uTorrent

[fake] uTorrent 2.2.1.0
(Question)Among the peers in my peer client list, there's one IP that shows [fake] uTorrent / 2.2.1.0. What does it mean? Can it hurt the other peers downloading process, somehow?

(Answer)It means someone's running a client that is pretending (badly) to be uTorrent 2.2.1

(Question)But could that, somehow, negatively affect the pieces being delivered by that client? My concern is that the file other peers are downloading could be, somehow, hurt by some fake pieces.

(Answer)Pieces that don't match the torrent's included hash data will end up being discarded, regardless of the client of origin.

(Question)So, if I correctly understood, there's no way of adding bad pieces to a good torrent swarm, right? Fake pieces can only be downloaded by someone if the torrent is itself a fake one, right?

(Answer)That's right.

Reference

 * Utorrent forum