I disagree. Cothority would prevent Apple from caving to public pressure, as long as enough witnesses didn't think that Apple should be caving. Conversely, I don't see how it could prevent Apple from caving to secret pressure.Because none of the witnesses would know that anything evil was going down. They might figure it out afterward, when the update was pushed selectively, but by then, it would be too late.
IF the update were pushed selectively. An across the board update could be used to selectively target someone(s).
I don't see how this could work from a legal and fiduciary point of view for a public corporation. I'm also generally wary from a human perspective - humans are vulnerable to wrenches, bribes and misinformation. Granted that it's more humans than one!