Do you pay taxes? Does the near-zero cost of the electricity vs the thousands of dollars the town will waste dealing with the matter seem like an odd tradeoff to you?
If you steal a $60 video game from a store, and as a result the store goes out of business or people become afraid of thieves, the county will lose a hefty chunk of property taxes. Society also loses the opportunity to turn a miscreant into a contributor.
If you plug your car into a school for half an hour, you ... what, exactly?
If everyone makes a habit of driving to the school to plug in their cars, I totally see it being a problem. If it is limited to everyone with a legitimate reason to be there in the first place, less so, but I could see it still being an issue.
