I don't know how soon about legal laws would come into U.S. or other countries about shunning. But awareness to the attention and public awareness has changed our culture and people's attitudes first and greatly. There are many affected on many issues. Drinking and driving for many years only created a shrug, or helpless situation. Legally and in public opinion, for so long nothing/much could be done. The laws got more defined. Also, wife beating, (that was only like a marriage privacy concern for so long) child abuses or neglects (degrees of physical disciplines and emotional abuses, so called for a long time only spanking or discipline,,family issue only). Laws there have gotten more defined.
So, hurting anyone in marriage, and hurting one's children have become public and not so 'private' and the law(s) have gotten more specific and some would complain, invasive. However, there is more studies of the long-term effect of such behaviors impacting public society.
I see, at least the media news and tv having real accounts of the Amish. At least they don't recruit so not as threatening. However, seemingly only a peaceful people with no electricity or cars, now people are aghast how they throw out their youth and shun them. They emotionally are not prepared for a life outside, and only going to school till eight grade doesn't help. Also, Scientology is getting exposure. I wouldn't have known as much about these religions if it weren't for their "apostates" or their previous members who are informing. The Scientologists vocal "apostates" are impacting that religion for certain.
Extreme practices within some Islam sects and even some Christian groups, have the laws challenged.
Laws do get defined, but very slowly.