browned: if you ain't doing anything wrong you would have nothing to worry about no matter who is listening.
Sorry to go off topic but this old chestnut really gets to me. EVERYONE has something to hide, there's personal information that can be gained from intercepting communications that people wouldn't want made public...
* Someone's sexual orientation if they're not "out"
* Someone fleeing an abuser / a crime victim
* A person's medical history (depression etc)
* Journalists protecting sources
* A person's looking for a new job, does he/she want their current employer to know this?
All of this information should be kept secret and there seems to be a few safeguards in place so that the police can't abuse this power - but they're human and can make mistakes (and some could use the information for their own personal gain), just look at the example last year where a camera containing sensitive information was left at a crime scene.
Browned, do you have curtains on your windows?