I have!
Making a right turn into the car park where I park my car, a National Express coach came up the right side of me, and wrote my car off as i turned!
I called the police, and the woman police officer took my statement in her patrol car, which she had parked behind the bus. There, large as life was a 'How's my driving?' sign!!!
I phoned and said "I'll tell you how your driver's driving is - dangerous and illegal, and I'm taking him to court for it!"
The guy on the other end said he couldn't comment, so I asked him what was the point of the sticker, and me ringing?
He hung up.