There's nothing funny about deciding to end your marriage in a Burger King, in fact, I cannot think of any place where it would be "funny" to do that. This Tweeter-guy or whoever he is should have sticked to minding his own business, or maybe his life is so empty and lacking real-life relationships that he needs to live through other people's eyes and feelings. Now, that is funny.
My guess is that the tweeting guy, and the rest of the patrons, would have preferred if none of this had happened. They didn't choose to be witness to the conflict. It was the choice of that couple to thrust the situation on the rest of the diners. In that context, I can't see that the twitter guy is guilty of anything other than, maybe, poor taste.
