Park rangers were alerted to an incident on August 7th of a man cooking chicken in one of the hot springs in Yellowstone National park.
Food and smoking are not allowed in thermal areas of the national park so him cooking there was definitely against the law.
The man has been banned from the national park since getting caught cooking his two whole chickens in a burlap sack sitting in a hot spring with a cooking pot nearby.
A man from Idaho, who was part of the group of 10, was cited for foot travel in a thermal area. He was also ordered to appear in a Mammoth Hot Springs court.
According to Fox News, after pleading guilty to charges on September 10, he was sentenced to two years' unsupervised probation and two $600 fines. During this time, he is not allowed to visit the national park.
An official statement from the US National Park Service regarding the thermal areas in national park:
For your safety and for the protection of thermal features in Yellowstone, it is illegal to swim or bathe in any water that is entirely of thermal origin. Hot springs contain algae, bacteria, and fungi found nowhere else in the world: soaking or wading in springs can destroy these life forms. Throwing objects like rocks or sticks into thermal features is prohibited since doing so can clog vents and alter the flow and temperature of the water. Food and smoking are not allowed in thermal areas.