Wow! I never heard of that one before. Maybe you should treat it like my friends did when I was a kid. I would say, "Mommy said I can't do that." They would reply, "Your mommy's not here."
How are the elders going to track who disfellowshipped people socialize with? It's ridiculous!
People need to be taught how to make good decisions and healthy choices instead of obedience, especially obedience of people who kick you out of their "exclusive" club.