You should not trespass on someone else's property.
Calvin is looking for mushrooms outside with friends and sees some on nearby property.
Calvin wants to find chanterelle mushrooms for dinner.
Calvin approaches the property owner and asks if he can harvest the mushrooms.
Calvin harvests the chanterelles even though there is a 'No Trespassing' sign on the land.
The property owner is glad to allow Calvin to take the mushrooms, as he has no use for them.
Calvin is arrested for theft of property and trespassing when the property owner discovers him there.