The curtain is there to keep people that don't have any business there out. Most of the international flights have layflat seats in F/J sections. And most peopl

The curtain is there to keep people that don't have any business there out. Most of the international flights have layflat seats in F/J sections. And most people don't put their iPods/kindles/iPads away when they fall asleep so the casual person could walk up and walk away with something. It's also there to keep them out of their toilets. When you have 40 people in coach waiting for 2 toilets and 2 unused ones in first the first you gotta make the firsties feel better for buying a more expensive ticket.