I enjoy the thrill of a discrete audience and gradually got my partner interested to.
Unfortunately this was spoilt by "doggers" who simply wanted to;
1. press their noses to the window and look, as if it was their right
2. get in the car and fuck her themselves
3. grope her
We had people knocking on windows saying "open it", people trying door handles trying to get in and I'm surprised we stuck it as long as we did.
The idea of sticking stickers on cars is poorly thought out.
Where do you think newspapers get lists of active sites from?
Where do you think the police get details of active sites from?
How will you react when the News of the World Journo starts taking pics of your car (like in the warnings section) to accompany his "exclusive" on "car park perverts"
Get back in the real world.
Discretion is the name of the game unless your behind closed doors.