Tash Peterson, known for her dramatic protests at restaurants, has claimed that farming is the "largest holocaust in history".
"KFC have blood on their hands and so do you if you're not vegan."
Others were more considerate, however.
It comes after animal rights activists in the UK began spilling milk in supermarkets to protest against the dairy industry.
The group has pledged to take direct action throughout September.
Tash Peterson is known for staging confronting protests and promoting veganism.
"We hope we didn't hurt you when we forced that coffee down your brass neck."
The notorious protester continues to make headlines for her shocking stunts.
Startled shoppers were told they support "rape and murder".