Letting other drivers know about the PiP

Aren't you surprised that Toyota didn't make it more obvious, especially to the car behind you, that the PiP is a plug-in vehicle? I wanted to make it a little clearer from the back - since it's easy to miss that tiny plug that's part of the hybrid logo. I guess there's some vanity involved - plus, not very many folks around here even know this model exists (so far, I've only seen two others PiPs in my area). So I ordered up this plate holder: My first thought for the top line was "Everyone needs a good outlet" - but that was one letter too long. It's also too bad that the message hides DC's slogan: taxation without representation.