I agree with you and that's probably the only criticism I could make on the in-flight hard product. But a good FA can make the difference for this. On a recent flight to JNB, full P cabin and I was seated at the window, the FA told the pax seating in the middle section to not put their bags in the bin over the window seats for the reason you described. He put the bags somewhere else and said to the pax they could have them anytime during the flight if they need.