GTA V Car Explosion Logic

This is something they could work on in Grand Theft Auto 5. Even when nobody directly see’s you blow up a car, you’ll still get a star. Why is this? We still can’t figure it out, in our opinion if no ones around, and you’re acting normal you shouldn’t get a star for blowing up a car. The same logic applies to blowing up cars in the middle of nowhere. What do you think?