Not long after I bought my M3, I too saw a pickup truck parked at a charging station. It wasn't a Tesla supercharger, it was a single, free charging station provided by a local market. On the way out of the store I was sorely tempted to shove one of the Idaho potatoes I had just bought up the truck's tailpipe. The only thing that kept me from doing it was that I was worried it might cause an accident when the truck stalled. If anyone has an idea of how to safely shame an ICE driver for parking in an EV charging spot, I'd love hear about it.