They pushed the kid aside with their arms.
You guys are out of control and uninformed.
Kids are paid to walk up to stars to get autographs, and those autographs are sold. The signings do happen, but all those guys know the effort is going to be sold.
The bodyguards usually keep everyone away, even kids, to prevent events just like this one. Another trick is to offer a handshake but no autograph.
There is a lot more going on here than you guys are aware of.