This bugs the crap out of me too, but it was addressed by the Raikage earlier on. So at least we know it's not an oversight by Kishimoto (that is to say, he's aware of the confusing double standard regarding the Sharingan and Byakugan).Originally Posted by Splash!
http://www.onemanga.com/Naruto/417/13/
Hopefully more will be revealed next chapter to explain why Danzo is willing to let the Sharingan potentially fall into the hands of enemies.
That paradox has been a major theme in this manga from the very beginning, hasn't it? Way back in the Zabuza arc when Naruto decided he wanted to become a "ninja in his own way" as opposed to being a tool used for war.Originally Posted by Splash!
I think that's why I'm leaning towards accepting Danzo as a figure of power. It's Kishimoto's "realistic" leader among a village of idealists.