Elevator Story, Quatre

You know you've been waiting for another one. This time, it's courtesy of Jim Houston, a new blogger at Talking Philosophy.  Simple story:  guy and girl romp in elevator at train station in Scotland, thinking they can't be seen.  But there's a CCTV camera, and now they're in trouble with the law.  Did they do anything morally wrong?  What's the punishment that fits the crime ... if any?  Houston