[quickthrower2]

This is good, but also sad in a way. It means Jo Blogg's blog won't get discovered and they may have had some good information on the topic.

One way to improve is a "bring your own list" feature, and the ability to include vetted lists. Maybe some kind of web of trust - if your friends have whitelisted a site, it is whitelisted for you too. If you find a problem with that site, you let your friend know to remove it. If they don't respond you can remove that friend from your trusted persopn list (maybe they got hacked?). Then maybe you can 'follow' a few lists of famous trusted people (e.g. paulg etc.) to build up a bigger slice of the internet you can search.

A spammer will want to come in then and create something that white lists their spam sites, but they need to convince you to add their list! And when you see the spam you can just unfollow them. They can't succeed.