Waymo driverless taxis capture troves of video footage in order to operate, but the company reveals very little about how much data is stored—and for how long.

Now electric, driverless vehicles have been summoned to protest scenes via the Waymo app. The resulting EV fires burn hotter than traditional car fires and are potentially more hazardous. The autonomous robot taxis owned by Google parent company Alphabet were tagged with protest slogans and profanity—and set on fire—as a way to disrupt traffic over the weekend and demonstrate against the widespread roundup of migrants by Immigration and Customs Enforcement officers.