Hey, I'm not saying my group is perfect; trust me, they drive me up the walls sometimes. It's just that, when it comes to driving me up the walls, it's never in the areas where trust is the solution.
Sometimes a gamer just has to figure out what's important to him and settle on the rest. In my case, I decided that I had to have a group that focuses on trusting each other. The rest I just had to settle for.
(For an idea of one of the things that drives me absolutely bonkers, see my
e-mail thread.)
I think that not allowing your players to describe their actions because you're afraid of what they're going to do with that "power" indicates some other issues may be at work -- issues that could be solved, whether your group's a herd of unicorns or not.