[dmix]

Private trackers are much more protected then public in many ways:

a) Its invitation only, if users give an invitation to a leecher/bad person then they themselves get banned, this creates an incentive to screen users thoroughly. Any person could go on a public tracker and have a list of the IPs of people sharing a particular torrent

b) Finding the trackers is usually difficult

c) Private tracker admins go to great lengths to anonymize data and protect their own identities

The law enforcement guys would have to be directly involved in these communities to gain privileges and also be on the edge of technical advancements. But given the fact that there are thousands of people for each law enforcement user (maybe hundreds of thousands) its nearly impossible for them to keep up. There are many similarities to drug trafficking.

[Zev]

http://www.google.com/search?client=safari&rls=en-us&... - not very hard to find. Or get into according to the top hit.