Say that you join a "youth social and adventure group", where, while rock-climbing or bowling or hiking, its core members will begin, subtly, to sound out your religious beliefs and talk to you about God, is that at all morally problematic? Or in general, if any group has the main raison d'etre of recruiting for a church/political party/pyramid scheme, but initially conceals this motivation (for instance, through initially avoiding any mention of the parent organisation), is there anything wrong with that?