I guess I'm kind of surprised that anyone can (or will) actually hold to a "will drop" policy for liability reasons. If someone gets lost or left and then gets hit by a car...eek. But I'm just thinking this way as a runner who absolutely didn't leave anyone, particularly newbies, when leading on a route that wasn't really well known to the whole group. And in that case, I would have to wait at the starting point until I knew everyone had come back or was otherwise accounted for (ie, phone call that they'd been picked up and brought home). But who knows.