No one is ordering anybody to close the shades. It's a request. Nothing more. Why not cooperate? Is it really such a chore? I don't see the need to make a big deal out of this.
At DFW this time of year, you board a plane and the shades will likely be closed. They'll often announce a request that you keep them closed until the engines and a/c get going. No one will do anything to you if you open your shade and want to look out, but, again, why not cooperate and help in some little way?