problem with bit torrent is that it is "peer to peer" meaning that if you can download piece of the torrent from someone, then that someone can also identify your IP# and associate that with the file you are trying to download.
This is how RIAA and MPAA are notifying ISPs and organisations of copyright infringments.
If you want the safest option, IMO, subscribe to a premium news provider and download what you want off the news groups. Its a one way street so no one except your news provider knows what you are downloading. And if you read their privacy policy you'll find most dont keep track of what people downlaod (unless its really dodgy stuff that pedo bear likes). You also get the added benefit that you are almost guaranteed to max out your bandwidth every time you use this.
have a look at the contents on www.newzbin.com, its a paid site that "tracks" whats on the news groups with a group of editors adding new "posts" all the time. You dont need to subscribe to that site to keep up with whats out there.. there are plent other resources.
you can sign up to a premium news provider here http://www.giganews.com/?a=dvdrcom that includes a referal code for http://www.binaryinvasion.com which "spots" the DVD posts, and is a free site (donations welcome). I hope the admins here dont mind, i'm just a member on that site. giganews offers a free 1gb trial.
then you can use either grabit from http://www.shemes.com/ or http://www.altbinz.com/ for Alt.Binz (which I use)
then use a nzb search engine like http://www.binsearch.info/ to find something you are interested in. for example, Heroes Season 2 episode 9, http://www.binsearch.info/?q=heroes+s02e09 ... i woudl pick one of the 400MB options.
if you are really interested I can help you with more details.