I tend to agree with Doubtfully, from what I know of the organization, it is entirely plausible that they would embark on a "sifting" of this nature, and completely compatible with the philosophy I recall hearing over the years about what will happen during the "time of the end" (i.e. doors of the ark closing).
I don't think there are any legal implications, nor do I think it will really hurt them - the faithful will be reinforced through society propaganda to believe that this is further proof of having god's blessing, and they will be scared sh**less of daring to drift.