Make sure you check out my links above. They are based on experience of many users. Some tips are to set both your uploads & downlds for auto-clear.Set your Speed to disallow Ultrapeer cabilities. If you do many searches over many hrs - don't allow there to be many rows of search tabs. Delete some of the earlier ones. These tips can help reduce the slowness impact on LW.

As for spam & porn ... well that's the gnutella network not anything to do with LW. This has multiplied over the past 9-10 mths.

Have a view thru this thread autogenerated spam results for tips. And I emphasize, please follow all the tips I left above in my earlier post!!!