through their routers?

F#ck me, a light switch that needs to go through the internet, through some Acme routers, back to the house and to the plug/socket.

this can't be right, i thought Zigbee was a stand-alone self organising network, like peer to peer. The stack is a bit heavy for a light switch - though with silicon cost it will reduce.

you can be sure that jokers will have great fun turning your house into a disco display once they've cracked the inevitably poor encryption/implementation.