Blogs generally, and in this I would include services such as Twitter, are essentially self-important spew from uninteresting people that masquerades as social networking. Millions of people waving their arms shouting "Hey! Look at me!" not because he or she has earned the attention but because he or she is convinced the attention is a birthright or something. Pointing out the ignorance, inconsistancies or hypocrisy of these folk may result in accusations of "denying their right" to attention. The real loons still get upset even if you ignore them completely, somehow equating that to infringing on their right to make a public spectacle of themselves.
It's ego stroking at the speed of light... impressive only from the standpoint that an irrelevent chunk of pseudoinformation can travel around the globe in a flash.
A very few contributors may actually have something valuable to add but the vast majority of articles are simply wasted bytes.