There are so many ways to write articles casting bloggers in a poor light. First, invent arbitrary ethical or journalistic standards which apply to no one else in the universe, and then show how bloggers violate them. Second, assume beliefs and motives of bloggers, lumping them all together, and then invent charges of hypocrisy. Third, invent arbitrary benchmarks for accomplishments which if achieved prove bloggers have superpowers, but if not achieved prove they are teh suck. Fourth, elevate an invented concept of "civility" as an all-important value. Fifth, the practice of "nutpicking," attributing the comments in unmoderated comments sections to the blogger him/herself.
I'm sure there are more.