It's amazing how thoughtless and selfish some people are. I young woman in front of me had a child who was pretty disruptive, but for some time I was able to distract him and he eventually calmed down. As soon as he did the woman punched the recline button and literally slammed the seat down. If I had been using anything other than a netbook it would have been toast. And as a reasonably tall guy my knees certainly didn't appreciate it.
This is why we can't have nice things.