I hear ya Geo,
Wait till they plug the 02 back together, they won't know why it runs so crappy!
Glad I didn't buy that new sensor!
I was also going to put in an MPGuino.
According to the officer that took the report, the best way we car protect our cars is with a steering column lock cover. It goes over the ignition. I like the hidden kill switch idea too. Or unplug the coil wire.
Dave