in no way is this yogscast's fault, and we shouldn't be sour towards notch, or the Mojang team either. Notch, or whoever decided to bring yogscast to the convention, should have known they are avid swearers. and the parents who brought their kids to the convention should know that video game conventions can be crazy, and that swearing is just a small part of it. maybe the parents should have researched what they were bringing their kids too, and not just blindly bring them there, if they hadn't already known. I also highly doubt that the yogscast would directly curse at a kid, or anyone if they are being serious. but i can imagine them jokingly doing it to a friend or an older fan.