I thought about that too but what if the robots appreciate their creators for making them better via violence? Then what if they return the favor .-. or what if the world turns into this:

I would only be worried about a robot revolution when we (or they) find a way to attain a power source that'll let them maintain most of their capabilities for more than 20 minutes.

Like if a power plant ever becomes fully automated. It could work together with the other AI and feed them. After they secure power resources they can focus more on weaponizing themselves and the termination of John Connor