If it's those blame day/night shades you are referring to; I read somewhere to keep the shades up while traveling to keep the pleats pressed.
I'm with OC, when they start giving us problems, they will get filled in the round bin.
But to answer the question whether up/down:
I say leave them up-all the time. If the neighbors don't like seeing me in my underwear, they shouldn't be looking.
But the BOSS wants them down at night, so they're down at night.
But will be down to block the sun/heat during the day too.