Mark
CreativeMountainGames.com
I think most people want to think for themself but sometimes lack the initiative to do so. This can sometimes be a problem with younger players, couples, or best friends who join a group together. I think you are on the right track talking to all of them without getting into specifics. If one player has been subconsciously controling another, or one has been subconsciously allowing themself to be controled, then this wake up call should straighten that out. If there's been a conscious effort to control or be controled, this will at least put everyone on notice that you are aware of the problem and do not intend to allow it to continue. With luck, it will subside after the discussion without the kind of drastic action I suggested above.