Hate to be pro big brother, but UPS has a bad rep here. Living in not quite ruralville where people let their pets out frequently, the UPS drivers around have killed at least two pets of neighbors. Iâ(TM)ve seen them driving way too fast probably double the speed limit.

No points to upmod, but thanks for that bit of info. That makes much more sense to me. The first that that occurred to me was the small chance that MACs would conflict, although I guess there could be ways to avoid that in theory.