See Arrange search results by size (click on link) As that's one simple way to see what's what. I can't answer your question directly because I am not a Java programmer or a LW programmer. I can only point out ways to avoid the muck. WARNING: Viruses on network you should be aware of! (click on link)

The Junk filter is a dynamic learning filter. Virii is definitely the hardest type of result to allow it to learn about. But I'm sure LW will improve the filter as time goes on. These are 'very early days' for the filter. If it was a year old I'd say "fair enough comment." But the filter works well for everything else. And does still filter out a lot of virii all the same. Just not all of it for some reason. Keep in mind the virii on the network has been getting worse week by week ever since the RIAA v's Grokster court case. Google Overpeer to see what type of groups are sponsored to spam the network with dirt to try to destroy it.