Very similar event happened to me at the Auburn Mall, MA supercharger. At night. Everything closed down. Nobody anywhere else around. Very creepy to begin with. I'm sitting there charging, and a small white beater of a car, like a Toyota Tercel type car drove up perpendicular and about 10-15 feet in front of me, and the driver (female) and passenger (male) just stood there, looking at me and the car and the SCs. For between 5 and 10 minutes (probably seemed longer than it was). I wasn't sure what they were doing, but it sure felt like they were considering robbing me. But I was sitting there like a dead duck because I was plugged in and couldn't just drive away. I also didn't want to get out of my car. They eventually drove away, but for a few minutes there, it was dicey.