These nodes connect, send you some packets and do nothing else!
No searches, if you are connected to them they do not pass on searches and they respond to nothing, mp3, mpg, avi, a e i o u, fart, mega, big, kinky, homeless, more, less, and, the, at, me, run, dont, freak, and a whole lot of other words.
It's an attack.
Why aren't you people seeing this on your clients?
Does your client show you a list of connected nodes?
Have you ever had a lot of connections and then not be able to search for anything?
This is the reason!