It sounds like getting the conviction to stick will take having the right case, with firm evidence and all the details of the case just right.
JWs are certainly not the only organization to practice shunning, and each country has different laws and tolerance for such things. I'm not looking for a change in WT policy just yet.
What is most egregious in my opinion is that the WT pressures people to get baptized, some are young children. These ones grow up or have other life changes and decide they no longer believe. They are then disfellowshipped and shunned. It's just a matter of moving on with their lives, yet they are shunned for it. It's a ridiculous policy.