Tim Berners-Lee about blogs credibility
"When you say there are a lot of lies out there, if you go randomly picking up pieces of paper in the street or leafing through garbage at the garbage dump what are the chances you'll find something reliable written on the paper that you find there? Very small. When you go onto the internet, if you really rummage around randomly then how do you hope to find something of any of value?
But when you use the web, you follow links and you should keep bookmarks of the places where following links turns out to be a good idea. When you go to a site and it gives you pointers to places that you find are horrible or unreliable, then don't go there again.
You see out there right now, for example, when you look at bloggers some of them are very careful. A good blogger when he says that something's happened will have a point to back, and there's a certain ethos within the blogging community, you always point to your source, you point all the way back to the original article. If you're looking at something and you don't know where it comes from, if there's no pointer to the source, you can ignore it."
From a BBC Interview by Mark Lawson.
