They are also great for camouflage in places like Madison WI, or Westchester County NY. Make sure you have the COEXIST and RESIST bumper stickers
I live in an apartment in metrowest Boston. Last December I put a magnetic Trump sticker on my rear bumper.
The next morning I went out to the parking lot, and the sticker was gone!
That’s one reason I’m glad I’m moving to Tennessee in three days.