[smartBridges] LAN side IP Addresses

[TopsailNet]

Title: Message

I have all my sB wireless devices set up with 192.168.0.x addresses. All clients connected to the wireless network either have static public addresses assigned or use DHCP to obtain a public address.   I have instructed my customers that use a DSL/Cable router to connect a network, not to use 192.168.0.x on the LAN side of their router.   Now I have a customer that insists he must use 192.168.0.x on his LAN (I won't go into his reasoning)   If I allow him to use this sub-net on his LAN, my concern is that some fat-fingered IT person will inadvertently (or intentionally) turn off NAT on his DSL/Cable router and flood my wireless network with a bunch of duplicate 192.168.0.x addresses that may bring down my wireless network.   Is this a valid concern on my part? Any voice of experience will be appreciated.