you know - your father does have a point - up to a point
most of mine aren't wild though
I suspect some of them could easily revert, but I'm not so sure about my third or fourth generation captive bred ones - some of them get scared if the food moves (yes indeed)
has your father put down his foot on garters altogether, or is it just a matter of insufficient education?
don't give up on your efforts to demonstrate responsible behaviour - that is always good currency with parents, not to mention that it's good practice in general