I think not only is it impossible to legislate against as you say but it is also a deep-seated human instinct to stop talking to people you believe are toxic.
The ancient Greeks used the otracon, pieces of broken pottery on which a person's name would be scratched that were then counted up to see how many have voted to banish a person. If the vote was unfavourable the individual would be exiled for ten years from Athens. It's where we get the word ostracise from.
The WTS are cruelly exploiting and abusing an ancient and instinctive human response to perceived threat from other humans. I agree the thing to focus on is to convince our loved ones we are not dangerous and they are not going to save us by shunning because we are never coming back!