Wooh, calm down. Gnutella has what is called a downoad mesh, which is a list of alternative sources for one file that clients exchange between them. You are probably in one download mesh for a file you previously shared.
When was the last time you run LW? Normal Gnutella clients will forget about you in less than a day. It may be longer for buggy clients.
Anyhow, how 50 hits a day a big deal? It's not like it consumes bandwidth, CPU power or if they try to infect you.... First time you look at a firewall log, heh?
Ciao