So, I'm feeling pretty vindicated this morning Went to another jam last night where the player, who I've since 'made-up' with, got involved in a dispute on stage. I was not playing last night. He was swearing and being pretty horrible, to the point that someone yelled at him from the balcony above to "show some respect." The Jam-master had to jump up there and restore order.
This fella seems to have really serious mental issues.