For what it's worth:
I found that around the time that I placed the high mileage award badge on the front of my M-B, my car started getting keyed.
When I used to belong to a M-B car club, I thought it would be cool to put their badge on the grill. This seemed to infuriate people enough that my M-B seemed to become a magnet for people to key.
When I finally put it all together, I decided to remove both badges and I've found my M-B to be left alone.
Of course, your experience may be totally different.