"The pointing again! They're screwdrivers! What are you going to do, assemble a cabinet at them?" - The War Doctor (The Day of the Doctor)
Ironically, as the Doctor grows older, he becomes less mature. All throughout this momentous adventure of colliding time-streams, Gramps is allotted the challenging task of disciplining his future selves. Now children, stop using a scientific instrument as your little play gun. Everybody knows you're just over compensating.