you can warn them and point the gun at them and say leave the area or you will get shot, if they still dont go then give them a warning shots and then give them final warning and then if they still not leaving you are allowed to kill him as it upon a situation.
If they say that you cant kill AAA you can simply say that yes sir i cant but you are abusing the system and i also warned you many times and also give you warning shots but you was not valuing your life.
Or tell him to come to ts and talk with him why he was doing that and resolved it.
if he dont come to ts you have the video and then you can report him for not valuing his life
but first try to talk with him or try to resolve with him.