SAN FRANCISCO – It’s a common sight in a laundromat, where a pile wet clothes has been pulled out and set aside by another patron waiting in line to use the washer. In California, a similar scene is playing out at electric charging stations, where EV owners are removing chargers from other EVs and placing them in their own vehicles. But the cars aren’t always fully juiced—a problem stemming from a lack of public EV charging stations, and one that’s making EV consumers a bit testy.

“It’s high time…for somebody to tackle the electric-vehicle etiquette problem,” Maureen Blanc, director of Charge Across Town in San Francisco, told The New York Times. Tensions over finding a spot to charge EVs in California are “growing and growing,” and manners seem to be going out the window.

The NY Times writes that California’s push “to make the state greener is creating an unintended side effect: It is making some people meaner,” as EV drivers are challenged with finding recharging spots for their vehicles. Charging stations are “not yet in great supply,” which is unfortunate for the leading EV market in the United States. As a result, EV owners are “unplugging one another’s cars, trading insults, and creating black markets and side deals to trade spots in corporate parking lots,” adds the newspaper.

Across the United States, there is about one charger for every 10 EVs—about 15,000 of the 33,000 nationwide are located in California, according to ChargePoint. (The NY Times adds that there are thousands of other, unofficial charging spots such as wall outlets that businesses or homeowners have made available for public plug-in.)

Although most drivers charge their EVs at home, using public chargers helps relieve “range anxiety” for EVs that have a range of 80 miles per charge. “Imagine going to a gas station that says, ‘Here’s free gas.’ Who wouldn’t want to muscle in and say, ‘I’ll take some free gas’?” Ollie Danner, founder of EVPerks, told the newspaper.

Until a long-term solution becomes viable, Jack Brown, a Google computer manager, created an EV Etiquette Survival Pack. He’s sold about 9,000 packs, which include hang tags urging other EV owners not to unplug someone else’s vehicle while it is charging. The pack also includes stickers that inform other drivers it’s OK to unplug the vehicle when fully charged.