Because someone read an article, mis quoted it and started a thread about how dangerous the double leg was and how it needed to be changed in light of all these accidents, when I pointed out how wrong they were, and how wrong said article was he deleted the thread in a huff, so I started this one!
You are correct and both ronin and I mentioned that the double normally ends in a flairing of the legs or a sideways drive so you out up outside the guard, its only if done incorrectly and you end up in guard it can be a problem, but even then done with proper momentum its hardly a game changer