I was getting sick of staff not locking the back door and the usual sign just wasn't up to the task.
The blood stains are a nice touch.
"Hello, yes, the cup holder on my PC is broken and I was wondering if..."
"Excuse me? I'm not stupid, I have brains! I just wanted to know..."
"This is ridiculous. I refuse to be condescended to. I'm taking my consumer dollars to your competitors."