Returns...again.

Today I had a man return a book.
And he DID NOT, under any circumstances, want to fill out the customer information portion of the return.
As in, he started quizzing me.
"Do they tell you why they're taking this information?"
I have a standard response. "We need this information in case there's a problem with the credit."
Since most people want their money back, they fill out the form.
This guy wasn't having it: "Is that what they tell you to say?"
Apparently he thinks "they" are up in some room, drumming "their" fingers together and thinking up schemes.
"I'm just following company policy, as we like to have full information when a return is involved."
I've been very careful recently to not become agitated when people over-question me. So I fall back on the "company policy" line, since I obviously don't make those rules.
"I'm NOT filling this out. Hand me back my card."
"Sir, I'm just following the rules. I'd appreciate it if you'd fill out the return receipt."
"I. Want. My. Card. NOW."
Okay Scary.
I calmly put his card on the counter. He grabs it and leaves.
The customer behind him in line shakes his head and laughs. "Crazy. So crazy." I smile back, thanking him for his confirmation that I was not being unreasonable. As he leaves, he says, "Good luck..."
I smile and roll my eyes, as if this sort of thing is funny, it happens all the time, oh silly people.
When really I want to bash my head into my desk and take a nice nap. That would be funny, too!
But since I already have a black eye, I'm done with the head bashing for a bit. It's just too visible...