I would not expect anything different from your ex. His history shows this. I do not think you are over reacting. It would annoy me as well. I am not sure what you can really do though if nothing was established in a divorce decree.
Personally, i dont like posting pics of my son on facebook. If you feel similar, i think it is ok to request that from ex and his new girlfriend. Maybe in writing and express the reason why.
I know your ex would not listen to you. But what about a neutral counselor?
