Ive download a fair few torrents and none of the winrar files had been passworded?
On the site i use(cant tell you here obviously) it tells me the health of a torrent i.e what the chances are of actually being able to download it

plus on all the popular torrents theres comments left from users of the site so whenever i download something i know for a fact its not a virus and it WILL download and work
EDITED, pm me what your trying to download and ill see if i can get it on my site, if i can ill pm you the site