Without the emotion, yes. I mean, with the emotion too you have every right but he does not respond in a productive way to your outrage.
In this day and age you do not post pictures of your children to strangers on the internet. He's out there trolling and has no idea what crazies are out there. Appeal to his sense of being a good dad and ask him not to post photos of them.
I think when someone believes they are gone and it's a done deal, appealing to their desire not to hurt you is not going to be effective. They will expect you to face reality and get on with your life. They will think you're being controlling and punitive.
For now, that is who he seems to be, done-guy. You have to speak in words he understands.
Adinva 51, S20, S18 M24 total 6/15/11-12/1/12 From IDLY to H moving out 9/15/15-3/7/17 From negotiating SA to final D at age 50 5/8/17-now: New relationship with an old friend __ Happiness is a warm puppy.