I like it open when im landing but when were taking off and in the air I want that crap closed. especially if youre right next to the wing and its sunny out.
the answer the OP, you don't have to ask them if they want it open or closed. if they ask you to close it, close it. if they ask you to open it, tell them youre not a big fan of flying and they can look across the isle if they must.
where are you flying into j rake? someplace cool where you wanna see the landing?