We don't send recruits to the front line until their training is complete and they've proved themselves ready for battle. My kids are not ready to be salt and light to adults who are vindictive and repulsed by the truth of scripture. Its hard enough to deal with lost family members (esp. grandparents) who question modesty and honesty. That's already asking alot of a young lamb. Kids from previous generations didn't grow up expecting opposition to their family's faith from grandparents, school teachers, PRESIDENTS.