yeah, what leavingwt said. i personally have a zero contact policy, meaning if they call, come to the door, or whatever, i ignore and do not answer....ever.
i also reverse shun in stores, and pretend that i never see them.
now, of course, they can still df me, cause they can do whatever they want, even though i have not broken any jw rules. however you increase that chance if you acknowledge any type of authority they try to have over you.
and they have zero. you give them the authority they desire by playing by their rules.