There are more than a few passengers who are lacking in etiquette - sitting in an aisle seat on one flight and the young blond girl in the front of me flicked her hair over the back of her seat, and it was so long that it was half-way down the back of the seat. I politely tapped her on the shoulder and advised her that her dandruff was making a mess on my tray.... It was moved fairly quicklyAgree with the benefit of not having someone recline on your kids head.
Person in front did that to us. Surely everyone knows the etiquette of letting the person behind you know before you recline instead of a sudden ‘thwack’.