You do realize that you can just require auths for the kids and not the adults right? It requires a regulatory and hardware solution but its very possible.
PS Also, no solution would ever be perfect. Walls don't deny access, they change traffic patterns. So if it works 99% of the time, its good enough.
PS Also, no solution would ever be perfect. Walls don't deny access, they change traffic patterns. So if it works 99% of the time, its good enough.