Pissed off of Derby, writes: In the past few weeks I seem to be getting a lot of people phoning me up trying to sell things, the one that just called asking if I'd suffered any personal injuries was just one too many though. My phone number is ex-directory, and as far as I know these peoeple shouldn't have my number through any legitimate means. Is there some kind of opt out system, or is it just a case of telling them to fuck off whenever they call?