I saw it suggested by a FrostWire programmer last year some time (the one who designed the original junk filter), that once everybody on the gnutella network starts filtering files less than 1 MB (1,000 KB) then these sponsored companies who release these autogenerated spam will simply increase the size of their spam (which includes virii.) Sponsored companies? Google Overpeer as an example of one. I noticed the mp3 spam only showed up after the Grokster court case. And virii started to arrive in more sizes also.

However, having said that, I'm also pro a size filter. One that could define a range of sizes to search for. The more tools in our defence the better. Also would improve search techniques if a person has an idea of the size of the file they're seeking.