As I have most recently observed on my recent flights to New Zealand for linux.conf.au, it seems that many of my fellow travelers are unaware of this simple rule:
When standing up from your seat, do not use the back of the seat in front of you as a handhold unless this is a physical necessity for you. This is very disturbing to the person sitting there, who may be trying to sleep. Instead, bring your own seat forward and use the armrests.
Yes, I’m talking to you, 61J.
That is all.