When I saw it live, I thought it inappropriate but didn't really think it deserved a flag. Watching the replays, most of it seems to occur when he is on his sideline or very close to his sideline. He's certainly not obviously taunting any of the opponents in the posted clips and I'm doubtful I'd even have eyes on him at that point. Yes, it draws some attention, but I think that is magnified by the TV here and possibly barely noticed by the participants.