You do realize that a vast majority of people have duty queue anxiety and that they simply don't want to talk to you and just want you to shut up right? As long as they don't die, what does it matter? Just run the instance and if they keep dying, then either boot them or complete it without reviving them. You think you're taking the high road of saying "it's democratic" but really, are you going in alone or with 2 other people you know? Do people know what they are clicking? Often times people will do a ready check and I can imagine that a vote kick confirmation to be confused with a ready check. I presume you queue for roulettes which is almost always going to have newbies because that's what it's for. Assuming I pass the ilvl check, I could throw away all my accessories and still do perfectly fine in any dungeon or raid because ACC don't matter all that much pre-5.0. Post 5.0 will be a different matter entirely but even then, as long as you don't die from a stack mechanic you are golden in my book.

Just let them play however they want to play. You wouldn't be the first person to carry someone through a dungeon and certainly won't be the last.