See the Grauniad for the proof. But ZOMG now I’ve proved him right so I must be wrong. <pfft!> – that is me disappearing in a pile of logical smoke.
More seriously: yes, vast numbers of blogs are full of junk, and probably rude aggressive junk (though I don’t know this from personal experience, since I don’t bother read those). Most (measured by volume) of journalism is junk too – it is just that in general it is fairly polite, well-written junk. At least in the UK the most obviously trash stuff gets conveniently dumped in the Sun, Mirror, Mail and so on. But there is plenty of rubbish left over for the Grauniad and Beeb.
Meanwhile, Marr’s successor as political editor, Nick Robinson, has previously criticised the tone and and quality of online debate, saying he had stopped reading most of the comments on his own BBC blog. “It’s a waste of my time,” he said in March this year, adding that the blog’s comments section was frequented by people who had “already made their minds up, to abuse me, to abuse each other, or abuse a politician”.
Yes, I’ve noticed that at the Beeb blogs whenever I’ve bothered look (which is infrequently, because they are, as he points out, full of trash). This occurs for the obvious reason: they are high-profile but unmanaged. Blogs are not supposed to be a substitute for leader columns (Dead White Man writes from on high to the Unwashed Massed). They are supposed to be part of a conversation between blogger, readers, and other blogs. Unless AM or NR can be bothered to get their hands dirty and (a) weed out trash in their comments and (b) take the time to respond t the better ones then his blog is, indeed, a waste of time.