Maybe from attacking others? So each time someone calls for a war or some such action they would be shot automatically by AI controlled robot with gun. Seems effective and reasonable solution.

How can you seriously be this naive?

There's a country in Europe currently being invaded in a war of conquest because the invader can for the explicit purpose of subjugating the population and seizing territory and natural resources.

Lets put a face to a name - Russia, somehow yet not officially recognized as a terrorist state.

There's another that's killed 71 children every day for the last 6 months.

We support that Terror state too, Israel.