Standing in the way of slop bowls: the woman blocking food delivery robots

Semi-retired professor Carolyn Marvin became a local celebrity facing down Philadelphia's growing robot delivery army: It's my first amendment right to protest'

One of you needs to be on the lookout for cops, while I block the robot, OK?"

It is a crisp fall morning in Philadelphia. Tucked away in a dingy alley, opposite a garage called Patriot Parking, 78-year-old Carolyn Marvin is laying out some ground rules for a robot-disrupting expedition. Once a suitable target is identified, we will follow it to a busy sidewalk and Marvin will stand in front of the robot, blocking its way. The photographer and I will take turns ensuring we're not all carted off by the police.