Inciting a stampede or riot isn't a protected act, anywhere. If you do something with the intent to get that result, you are responsible for that result even if the victim was stupid for responding like that.
Taking a total disconnect - if you toss a firecracker under someone's seat, and they jump when it goes off and hit their head on the bin overhead, you will probably be found and held responsible for their injury in any civil or criminal response.
Now let me really shorten that: "Don't be an ass"
