This was told to me by a co-worker.
I work in a gift shop that is part of a museum. That museum is located on government property.
A child - maybe 4 or 5 - goes into our toy section and opens up a toy and begins playing with it. My co-worker - a manager - sees this, looks around for someone that could be their parent. Not seeing anyone, she keeps an eye on the child for a minute until a a lady appears.
Lady(L): Oh, did you find a toy you wanted?
Child: (Enthusiastic nodding)
L: Great! Let's get going!
She then stuffs the toy into her purse.
Manager(M): Are you going to pay for that, ma'am?
L: Excuse me?
M: The toy you just put into your purse. Are you going to pay for that?
L: It was already opened. You can't sell it in that condition anyway. So why don't you just give it to him?
M: No, ma'am. He opened it. You have to pay for it.
L: NO! JUST TAKE THE FUCKING THING BACK! (Grabs the toy out of her purse and throws it on the ground and leaves in a huff.)
Two things you need to know.
1) The toy was about $5 with tax.
2) If she would have tried to leave with said toy, that would have been a federal offense since we are on government property.