As history proved, fake and wrong data are always used by groups of people to start attack. If the rules of A.I. and data input are controlled by such people, it will be a tragedy for human beings.
Just as US claimed Iraq possessing mass destructive weapon, then sent troops to topple their government and killed their President. Finally The US admitted no such weapons were found.
https://www.cnn.com/2013/10/30/world/meast/iraq-weapons-inspections-fast-facts/index.html
Though many Google staffs oppose Google's deal with military, it turns out useless as expected.
It's not surprised in the future that one day an innocent person may wake up and see a drone out of his window due to some wrong data mistakenly or intentionally input in their operation.