How would it work anyway?
I use a different name. My profile is set to private so only friends can see posts. I don't put where I work, the area I live etc. I talk about schools, but without name. I am not on any of the schools fb or twitter pages. Nor do I post pictures of children in their uniforms, in the school, with their bookbags etc.
So I could have the above but name the school. Ofsted wouldn't be able to see those posts.
I am not the only one who does this. And more people are locking down their profiles. It would just like coming on here and reading posts about was the teacher unreasonable as there is no other identifying info.