Harm people more than they do benefit them.
Although I believe they were harmful to me, I must admit that my parents do better within the JW community than they do outside of it—and they genuinely tried! Both of them were separately disfellowshipped, and they weren’t doing better then than they are now.
I believe that specific harmful teachings, shunning in particular, should not be allowed though as this goes against the very freedom that non-for profit organization benefit from and is actually harmful to the public.