Do people really go hunting with an air rifle? I though that was
another name for a BB-gun. Like we used for target practice when I was
10 years old at summer camp.

What is the advantage over a real rifle: cheaper? less likely to kill
the neighbor kid? are there laws that apply to rifles that don't apply
to air rifles? something else?

http://www.airgundepot.com/faster-isnt-better.html