Haha, I'm all too familiar with confusing people with that game xD
Me and a mate of mine used to use it to convince people we shared a telepathic link! People would tell one of us a name without the other knowing and we'd 'read' each others minds, opening sentences with consonants and using physical 'tics' to convey vowels :P Used to trip people out!

I figure Joy's code and bugging out shouldn't mess with too much, though, since Cameron probably already has people looking for her and Tia could probably 'overhear' the logged/recorded phone call to the prison with her power.

EDIT:
Also, I think it's safe to say that Joy's parents used to show her 'Terminator 2' as an instructional video. To the point where I might as well have one of her fake ID's read 'Sarah Connor' xD