Interesting. I have flown over 100,000 miles a year for quite a while now and have never once encountered a child seat kicker, or an adult seat grabber for that matter.

The only unruly child I have ever encountered was about three and was running, followed by his mother, from the very back of the plane to the very front on a 757. I asked the flight attendant to suggest to the mother that she contain her son's exercise to coach and that settled the matter.