The hell with you

Is it ever acceptable to tell a customer to go to Hell?

Yesterday a man left a machine with me for repair. That's cool. That's what I do. He even bought the part he needed. That's cool too. I only have to charge labor. He wanted a receipt (I needed him to leave it overnight). That as well is cool. I would have given him one anyway; it's a standard business practice. At that point he left.

He returned within about 90 seconds and started taking pictures of his broken machine. While I stared at him he explained, "I just did some upgrades and want to be sure I get my machine back."

That's when I thought I should tell him to go to Hell and take his machine with him.  I didn't, but if I had, would have I been wrong?