Check these links 1. autogenerated spam results, & also 2. autogenerated mp3 spam results

And Google Overpeer & you'll get an idea of the groups who are sponsored to spam the gnutella network with rubbish.

If you're using LimeWire then use your Junk filter to filter them out. It's a dynamic learning filter & is quick to learn the most basic spam as you've mentioned. Viruses take much longer to filter out. You can also use your keyword filter where necessary.

Basically ignore anything less than 1 MB (1,000 KB) in size.

As you can see these topics have already been discussed many times on the forum. That's why we keep Stickies at the top of each section of the forum. We also have a search button to help people find answers. Since over 90% of all questions posted have been asked before. lol