Bloggers are accorded the same protections as all other individuals. You are free to criticize the work product, but not the person........
Why?
If a blogger (call them BLOGGER-X) uses BLOGGER-X as their F/t handle then yes, I agree with you but if BLOGGER-X uses an entirely different handle of F/t then I say no, and the blogger is fair game as when they post on F/t, they are posting under their handle and not that of their blogger name.
Now with that, you can see that there is a loophole as if BLOOGER-X knows what they are doing
, they use both BLOGGER-X as their blogger name and their F/t handle and thus only their blog & blog post can be commented upon/criticized but not them as a member of F/t.