Apart from The Pirate Bay guys, most tracker administrators are acutely aware of the risks they expose themselves to, and do everything they can to hide in the shadows. The chaps over at Torrent Freak have conducted an interview with a tracker owner to find out the lengths these guys are prepared to go to protect their identities. Here's a taster:

Identity is Everything - If you never tell anyone, no-one will ever know
If the authorities/MPAA/RIAA don't know who I am or where I live, they can't threaten me. When I'm working on the site I use either an encrypted connection via an Internet connection available in these premises (my name isn't on the bill, adding another layer of confusion), or a secure VPN over a local open wireless network. For me, hiding my activities from any ISP accounts even remotely linked to me is important, as I don't want any ISP to be able corroborate anything specific about what I do. If approached by a 3rd party for information (with a request like “can you confirm that such-and-such connected here at XX:XX time”, for example), they know little or nothing about what I'm doing, throwing any gathered evidence into doubt. I think the recent OiNK bust was quite a wake up call. I for one was laboring under the misconception that copyright issues are mainly civil and I really only thought through evading civil actions. Once the police get involved, they can find out pretty much anything about you from anyone. Thanks to what we learned about the OiNK bust, my improved security measures should save me from the police too, in the small chance they are interested in a relatively small fish like me.

Registering a Domain
The WHOIS for the site's main domain is protected, for that added layer of annoyance, although even this isn't foolproof. Our main domain name isn't owned by anyone who has anything to do with the site, so it's pointless threatening that person, even if they find out who it is. It might not stop them making threats so just in case the domain owner complies, other domain names point to our server too and every user is aware of these. None of the domains are owned by me.

Server Location
I would never choose a host in my own country and I'd never put a server in a country where my worst anti-piracy enemy is located, the legal wheels turn too easily. But if the wheels do turn really easily and your host hands over your personal details, you will have been clever enough to make sure that they never had the correct information in the first place. Pay your host on time and be a good customer, you need him onside.