Couldn't you simply park next to them and unplug them, especially if you know they are not actually charging?
I probably would have unplugged them at that point.
This is why we need more charging stations on the island. Wouldn't be an issue if there were more charging points.
You can check out this link from the DOE for most if not all of the charging points on Oahu.http://www.afdc.energy.gov/afdc/progs/i ... hp/HI/ELEC
Supposedly, there is a charging station on Ahui St, about .7 miles from the Judiciary Building, or you could have used the L2 charger at the Green Energy Outlet. I have used it before with my ChargePoint card.
There are options out there, but just difficult to find them all.