I noticed the other day that my old man, who's been using my car as a bit of a workhorse because it's bigger than his own car, has managed to chip and/or scratch the glass on TWO of my Defi gauges, and also scratched the top of my head unit on the frame above the display.
When I confronted him on it, he simply dismissed with an "It's alright..." and I said, "Umm, no it's NOT. If I did that to your car you'd have the shits. These are $400 gauges, you know I spent a big chunk of money on these." I slightly exaggerated the cost to try and make an impact, but I may as well not have bothered.
I'll have to get photos.