This phrase was stolen from my kid's daycare educator, who uses it in perfect context when toddlers are snitching on their playmates for entirely inconsequential things. It also applies PERFECTLY to drivers ;) and doubles as a self help maxim!

6" x 2.5" matte bumper sticker with true removable adhesive backing. The thick vinyl resists damage from water and sun, and the removable adhesive allows you to easily move the sticker later without damaging your vehicle. Also works well on windows, computers, tablets. 

To apply, first wipe the area it will be applied to clean with soapy water. You can use a credit card type item to smooth out any air bubbles once it's applied.