LOL!
We had one of those restaurants across from where we used to live, and someone pulled the same stunt with their neon sign.
It took 'em a couple of weeks to fix it. I laughed every time I passed by.
We are so immature. My sister also brought some "whistles" for my dad's 75th that sounded like people passing wind. If it wasn't for low class, she'd have no class at all. ;)