Was just there this Saturday and it was a mess. It was empty when I came in and almost dinner time when I left (multiple cars just lining up blocking traffic) they either need to get Valet just like San Mateo or designate a proper waiting spots.
I just thought of something:
By reservation only.
This is how I see it implemented:
In software. Registered by the nav, and enforced by the pedestals. Big sign at SuperCharger: "
BY RESERVATION ONLY VIA CAR NAV." Also on each pedestal where the cord hangs up. Would say it right in the SuperCharger information on the in-car map. You would have to either be autorouted through there which would cause a reservation (and calculated into the time of the route, so nav might route you some faster way), or same thing manually because you actually click (press) on the charger location and it says "Reserve Charging Spot" button right on the SuperCharger information window. (Since nav is extra on some Tesla cars, even on Teslas that don't have nav, the SuperCharger button would be available to reserve the spot.)
If you pull into a stall in some sort of mad beligerance and try to use it, the SuperCharger would refuse to start, and the car screen would give the error "By Reservation Only; please pull out of SuperCharger stall and make a reservation."
(The reservation system could even tell you a recommended charger to use as soon as you arrive, for any stalls that are slowed down due to pairing, wiring, or other issues. This would allow better time estimates in the reservation system and avoid late situations.)
Late fee for cutting into another persons's reservation would be double the current late fee.
Anyone who arrives late by 7.5 minutes, for whatever reason, would forfeit their reservation, and another person could move their reservation spot. The car nav would know this, and continually update the reservation to the expected time of arrival.
If any current owner who uses Cupertino SuperCharger thinks this is a good idea, tweet to @elonmusk about it; I sold my car last year.