What's needed is for limewire to 'learn' IPs that are:
- High on the response list (say "I have it")
- But never really send anything

are bogus and filter them out

Also:
If there was a central blacklist db of IPs (like MAPS/ORBS for open relays) limewire could query it.

But as a first step, the ability to block a full range of IPs ala 65.14.0.0/16 would help a lot.