@spendius,
What about the phone-tapping furore?
I must confess I'm a bit puzzled.
If a journalist, or anyone else, overheard a conversation in a pub, or through a keyhole, or anywhere else, he would not be criminalised for making use of the information thus gleaned.
I suppose opening sealed mail is an offence.
But how different is phone-tapping from an overheard conversation?