i had a separate sim card and for any non payers or messers id order pizza/curry etc to there address as my little way of revenge but then thought i was being childish and idiotic putting the delivery drivers and takeaway companys faulse deliverys, to the worse cases who owed 3 or more cleans i rung a few cab firms for after midnight and said to knock loudly as partially deaf.
Not done it for years now though, i grew up and decided that messers were simply best just not on the books.