Facebook Harassment: When is a poke one too many?

As I sat in my dentist's waiting room yesterday (no work necessary, thanks for asking), I read a report in the Daily Telegraph about the first man who has been taken to court in the UK for allegedly harassing his ex-girlfriend via Facebook.

Whilst all new communication technologies seem to eventually make it to court for allegedly involving harassment, surely after the first unwanted sheep or two had been thrown in the ex-girlfriend's direction, or he had poked her once too often, she would have simply de-friended him. As the trial is only up the road I am almost tempted to go along later in the month and find out exactly the role Facebook took, surely it was a minor part that the media have decided to focus on.

UPDATE: The defendent has been cleared according to the Register 27/03/08