It's literally impossible to go out and erase things on other peoples' computers, or to
completely block any one person from gnutella. Gnutella was designed from the ground up to
protect freedom of speech and the freedom to share, and to make it impossible for any one
entity, no matter how large, to control in any way.

You can at least partially shield yourself by going into the options for LimeWire and adding
more keywords to the keyword filter. Here's the set I give out to anybody that wants to block
porn and spam: http://www3.telus.net/Aaron_Walkhouse/FilterKeyword.txt

To report this kind of thing you should familiarize yourself with all the various tip lines and
organizations around the world and use the appropriate one for each IP address you find. As
you find them you will inevitably find the one nearest you, which you can use whenever you are
not sure where the IP address is located. If you want to become active in anything, finding out
on your own where to go and what to do is a necessary step, otherwise you will falter and
never really get started.

I will tell you that most of them tend to use the word "exploitation" in their names or on their web sites. ;]