Calling some random stranger up and asking them for money that they haven't bothered to pay back in years just seems counter-productive to me. I mean, in most cases whenever I've had a years long unpaid bill its generally because I have absolutely no plans to pay it.
80% of all debts incurred in America are never collected and that is a formula for a lot of cold nights and wondering where your next meal is going to come from. No thank you! I'd rather sell bean pies on the street rather than accept that job...not that there's anything wrong with selling bean pies on the street!