FWIW, I'm personally hesitant to charge using my L1 EVSE in non-secure parking areas if I have to leave my car. Someone could come by and steal it either for the unit or just for the copper. In the very rare instances where I L1 charge at a far away (for me now) building in underground (reasonably) secured parking, I still use a padlock on the J1772 handle in addition to turning on the Leaf's (easily defeated) charging lock.
I say reasonably only because potentially over 1000 people have legitimate access (employees of my work and another company + other misc staff like janitors, security, caterers, etc.) to that garage and often during business hours, the metal gate is left open, so someone could walk past the wooden swinging bar to get into that garage.
In totally non-secure areas, in my book, it's not worth worth the 10s of cents to single $s of electricity to risk my several hundred $ to replace L1 EVSE.
If there are cost consideration in terms of wiring, electrical instructure, etc., maybe an L1 EVSE like http://www.powerpostevse.com/products.html might be better. Or maybe you could get something with a quality low cost L1 or L2 EVSE integrated into it?
The ultimate answer is to move towards embedded wireless as soon as the installed base in cars is high enough, but that's likely to be 5-10 years away. It probably comes down to free L1 (as installing and maintaining a payment system is likely not cost effective for them) versus pay L2. I'm aiming for one or the other, or a mix of both types in a few areas. The locations I'm thinking of recommending L1 are long-term overnight lodging/camping areas, generally somewhat separate from day use areas, and hopefully that will provide some added security.
