The Amnesty link shows a girl who looks like Malala, the child shot in the head for being a girl and wishing to go to school.

Children, their teachers and ordinary Muslim people are being killed in horrifying numbers by the people who the drones target.
The numbers killed by drones are trivial in comparison.

Neither Stamford nor any other Westerners can go to the tribal lands and find the truth about who the drones kill.
It is in the interest of the Taleban, who control those areas absolutely, to exaggerate civilian casualties and conceal activist deaths.