Parking lots?
Industrial areas at night?
Watch-out guys! There's a little device called a security camera who could watch you in these places...
A buddy of mine who worked as a security guard had a few XXX show form cameras in parking lots, late at night when nobody is there... Remember these are usually equipped with powerful zoom and sometimes, there's many camera who can be aimed to where it's required...
Spiky: What good will a spare key do you if you're inside the trunk? As far as I know, there's no keyhole from the inside!
Unless you're a midget or have a huge car, I don't see the trunk as a valid alternative... But, a cube van with a bed inside...
