I could totally, totally be over reacting. But this WAS an unprovoked series of comments about me as a parent, and something that if said publicly would actually affect my efforts in court.
Yeah. Maybe I'm not overreacting.
You're not overreacting. Disordered people can be unpredictable, which is a big part of why they're scary.
Don't give him any rope to hang you with. Now may not be the time to try to have any significant interaction with him. Greyrocking is good. In time, your legal stuff will be over, the kids get older, things change. You can reassess and change your approach in the future- if it even matters then.
One would hope that a court would require proof (which wouldn't exist), rather than rely on hearsay, no matter who those people are.