We don't want them to be any more stressed out than they already are. Restrict shooting times to very strictly defined windows of opportunity when there is little passenger activity. Passengers go to airports to catch planes, not gawk at starlets. While a few would certainly enjoy sneaking a peek, they would only hold up the rest of their fellow travelers trying to squeeze through a crowded concourse. So it usually means getting up early and staying quite late, and working on Saturdays.
Late nights do have their drawbacks, however.
The script called for rain, so they made rain. But during the night, the temperatures plummeted and caused all the water to freeze. I had to wake up my poor guys and get them out here to deice before the next day began. A Philadelphia ad agency was doing a candy commercial at a gate and refused to stop filming, even for the few minutes I needed to let passengers off their plane. So I stood right in front of the lens and hollered, 'It's a wrap.