I have long been a silent critic of stores that sell candles with Bible verses on them — costing five times what they might cost at Target without the verses.
A secondary thing… I am not willing to put a symbol on the back of my car telling the world of my faith in God. The simple reason is this — I am not a perfect driver. One day I might accidentally cut off another driver — and make her angry. She will then see that symbol and lump all Christians in the “bad driver” bucket. Furthermore, I doubt that anyone will change their course toward God through seeing a symbol on my car.