If you have to make a statement, Ratter, first check your contract as to what they have written, if anything, about confidentiality. If that is clear:
"I have made comments of Facebook about working in a home. I did this in my own time, on my own PC and have never mentioned the location and/or employees with whom I worked. I believe my comments to be an accurate reflection of what I have seen and heard and would welcome an inquiry, held by an independent auditor appointed by the directors of the Company to verify what I have seen and make proposals for the change of care and performance to the benefit of all, care clients, staff, management and shareholders.
Having read my contract and taken counsel as to my right of such expression, I believe that I am fully in my rights and any action deemed to undermine confidence in my employment with the Company may necessitate appropriate counsel with my lawyers."
Modify the text according to the confidentiality clause and if you have the contract with you, it would be useful for you to let us "see" that.....