That's a matter of opinion too, Zoom, as to whether her sources are valid or not. I happen to disagree with her sources and with her position on the dangers of tug of war.
Like you say, everyone is entitled to his/her opinion about this and to which sources to give more weight. I happen to go along with those opinions of people highly eductated in animal behavior. She tends to go along with opinions of some trainers, of whom, I have no idea what their credentials are.
Yes, things can go wrong with tug of war if handled badly. (as can things go bad with anything, such as Dekka explained) But in my experience, that is extremely rare for the game of tug to present as dominance aggression. Like I have mentioned before, a lot of regular people, not particularly savvy with dog behavior, play with their dogs and nothing awful ever comes of it. Its been explained why it is not a dominance type of behavior. If a dog is already a resource guarder, that must be dealt with and as Corgi P. explained, even then this can be used as a training tool for that. The fact is that the vast majority of dogs will never develop dangerous behavior problems from playing the game, tug of war. There are many, many other things that contribute to rotten behavior that carry much more weight and significance.
Yes, we all have a right to our opinions. I've never denied anyone that, for heaven's sake. It's all in the interpretation, I guess as to how someone views "making fun" of someone or simply disagreeing with them. I don't need to re-think what I have in my mind or in my heart. I already knew what I felt like when I posted.