Grr... guess what happened this morning ?
I have AJ's silver '5 parked outside my house - scangers broke into it at 0700h, gave up then moved on to the neighbour's Honda MPV. I called the cops, then chased them once they discovered the MPV was immobile (after bending one of the doors back and wrecking the wiring and ignition switch). The scangers took off in an identical MPV they had waiting.
On the plus side, I was armed with a crowbar so put their passenger window through

Cops turned up 15 minutes after I called them - way too late though.
AJ's car has an alarm and immob, but I had the battery disconnected (the car's in a bit of a jock). The roof is ripped over the driver's window, but no other damage. I reckon when they realised there's more water inside the car than there is outside, it wasn't worth playing with the ignition wires

Anyway, moral of the story remains that MX5s just aren't safe unless they have a good alarm + immobiliser + probably something visible like a steering lock or something. I have to break the bad news to AJ now...
It's a small world after all. It's a small, small world