Caution: Show Dogs

On the exit ramp from 695 onto Dulaney Valley Road, I spied something like this on the back of a minivan:

The one I saw also featured a silohuette of some frou frou pup. Here's the thing, though: shouldn't we exercise caution because we don't want to injure the people inside the car? It makes sense to slap a caution sticker like this on something that doesn't typically carry precious cargo, like a cardboard box or a suitcase or something. But on a car? And for dogs?