So, I guess there is not a designated day to shed light on the shunning policy.
Agreed, it is impossible to get all the witnesses to disobey the GB. However, one problem is that not enough people know or even care about the shunning policy. I'm not saying it's going to change, but for change to start there needs to be mass movement that can be talked about the world over online, on tv, in other places of worship, and in government agencies. With enough pressure and info many within the r&f may refuse to shun. Also, it would help detract from their message by warning potential converts.