Except everything listed in Xtorrent is illegal. That particular program is meant for pirating.
Are you talking about this xtorrent? This looks just as legal as any other.
I downloaded the trial version. My first search rendered such illegal items as ChromeOS, SketchUp, SXSW and the Avatar trailer.
Sure, there are other things listed that aren't so legal, but that's the same with any torrenting search engine that I know of. Still strikes your "everything listed" argument though.
䷟䷽䷏䷁ — Dying of the Light.