A bit of the pot calling the kettle black, eh, beauty?
Seriously, I think TSandM started this to bring out the public image problem with DIR folks, not to beat the "twins" thread horse.
The difference in approach between DIR and sidemount, for example, is WAY different. Some people dive with two long hoses. Others say, not a good idea, and this is why. No one says, "you're going to die" if you - as a newb - say you are going to try the two long hose approach. In fact, the common answer is, "come tell us how that worked for you", and not in a snarky way.
The main difference is that acceptance of different ways can be okay. The DIR approach seems way too quick to go on the "you're going to die" bandwagon, or the "you are not DIR because you don't do it the way I do."
Seriously - what do you think? Are the vocal minority painting the majority with the tarred brush?