You learn something everyday

Awhile ago I was renewing my car tags.  On my way out I casually remarked that I was going to put the new sticker on top of the old sticker.  Quickly, the lady helping me out told me not to do so, stating that it is easier to steal if you stack sticker upon sticker.  I hadn't thought about that before, but I guess it does make sense.  So from now on you should put the sticker on a blank spot.  If you don't have a blank spot, scrape an old sticker off and put the new one on.