Tanking on a glad is not just hard on the tank but on the healers as well, they have to heal more while watching that they don't rip threat from their weak threat generation. I can understand why a healer left. It's just plain rude to do that to a group of strangers, any reaction was the tanks fault.

I'm convinced people who think this is a good idea in a DF group don't understand what a pally loses by being glad, or are just hopelessly sticking to a tired point that you're not allowed to abandon a group no matter what.