Genuine P.A announcement (I was on the aircraft) upon landing at Heathrow from Lagos, on a VS flight.
"Thank you for chosing Virgin. We hope you enjoyed your flight. The following message is for the passenger who left a disgusting pile on the floor of the toilet in the economy section.
We highly recommend you see a doctor as soon as possible, and in future, we would be grateful if you would choose to travel with British Airways"
How the cabin crew put up with certain passengers behaviour is beyond me.