1. An IP can have many domains, (and a domain many IPs), so it may not resolve to the right page.

2. Many sites benefit from the network effect. Ten people seed, 100 download initially, then continue to seed, allowing 1000 to download, etc. Without mass adoption of snooping for who-is information people are basically going to move on anyways.

But I think I've thought a partial solution. What we want is two things: Have a significant portion of the semi-technical (a hacker's girlfriend or boyfriend, for example) internet population be able to get back to the site they want. Secondly we want the government to not be able to take down the server that we are communicating with once we found out where it is.

All that is really needed to make domain name seizure irrelevant is a little browser addon "IP History" or "Website Time Machine" or something that will passively remember where the IPs are of sites you've browsed. Each time you try to go to a URL the addon will make a check to see what percentage of the internet browsers have reverted to the old IP address. If this % goes greater than a threshold, say 0.5%, it can slide out a window saying "Some people have used the time machine on this page recently, are you sure this is what you want?"

It makes DNS a less distributed thing. I don't think manipulation would be all that much of a problem, (I can think or 3 counter measures right off the bat).

As for the IP problem, if this browser addon becomes widely used enough then it could support some sort of standard that admins could solve the one-ip-but-many-domains problem.