didn't a few of the Chrysler facilities do this a year or so ago?
I used to take so much shiet from random people in the parking lot when I drove my MAZDA Rx7 to work at the FORD plant...
Apparently most of the line workers didn't seems to know the Ford owned Mazda... even though we were making Tributes right there!
I tried parking my dad's miata at the GM plant once, when my car wouldn't start due to a dead alternator at 5am.... That wasn't so wise. I was left a nasty warning note never to do that again..