Okay... couple points here.
First off, if I used the character creator in a pit fighting game to model a realistic facsimile of my mother and then scream at it while I beat it to death, that's kind of worrying behavior. Fantasy violence is one thing. Assaulting real people in effigy is quite another.
Second, there's content. It's one thing to enjoy the cathartic enjoyment of violence. It's quite another to want to torture someone. This would be more like playing That One Scene in Grand Theft Auto 5 and being way too into it.
And finally... is it? Like, just a random basic holodeck character who exists to spout historical dialogue or film noir cliches or have sex with you is one thing. But feeding years worth of personal logs into a system that we know has produced sentient non-biological life forms at least a couple of times...?