When you are proud parent you would like other people to watch out while they driving. On other hand if you spot sticker like this on parked car around shop mall – then be aware and do not park near to it. Small pasangers of this car can scratch or ding your car.
This is more explanatory just “baby on board” sticker :
From this sticker you can feel intent of driver.
Well you need to keep in mind if there is no warning sign then it dosen’t mean no kids on board. Stay safe.