In my opinion, it depends. I wouldn't kick someone who was 'reasonably' undergeared and trying, unless they refused to listen or try to correct what mistakes they might be making. Someone who randomly /afks? Oh hell yes. Nothing more annoying, especially on a long dungeon or raid. On a raid that was current content, yes, I'd vet people to make sure they met at least basic gearing standards. (Are they gemmed, enchanted, and have class appropriate gear at a good enough level to make them something more than deadweight?) Otoh, when the warrior 'tank' is wearing cloth with multiple empty slots and refuses to equip anything else, hell yes, I'll boot them in a second.