Not intentionally no, but there has been several instances of trucks chucking parts into the stands (Tacoma being the worst, Crusader had a shock cap end up in the stands at one show and the Doomsday encore had a truck chuck some sort of part into the crowd aswell). Trucks are allowed to get even more out of shape and allowed to try to recover from crashes or rolls even more so then last year. You give those two factors more time and there will be more instances of it.
I am not even going to get into the drivers and how much abuse they take from driving. They do a masterful job of keeping it to themselves and not making it public but if you think they don't hurt, you are just ignorant. These guys and gals put their selves through hell for our entertainment.