I think overflight is pretty much ok considering the capability of those small missiles. I'm not sure either that the guys would waste some trying to shoot airliners that you barely see when there is a lot of other potential military targets around... I'll always remember the cabin crew's faces when we went to Somalia in 1993(with french army)... We landed in Mogadiscio with a civil plane and landing there at a time was something ! I wish I could have been in the cockpit that day. But I was just 19 at the time, and not yet eaten by the flying virus !