A few years ago a colleague of the wife got called in to HR to discuss a criminal conviction that he hadn't declared.
"What conviction?" he asked.
"It says on Facebook you've been fined £574, that means you must have been convicted. What was it for?"
"You daft [insert expletive of choice], it's just a bit of fun on Facebook totting-up things like 'had sex in parents' bed' or 'been skinny dipping'.
Not that I've done those, obviously
but they'll do for illustrative purposes. People need a private life.