So you think they hire somebody to control whether they accept a bit from a particular person? Think about how many people punt in NZ, and how many places you can do it. So many self service terminals in lots of pubs. Do they have a massive book of people they don't accept bets from? What about the people that bet 2k+ every bet, that don't have a tab account and bet solely with cash? Do they follow those people on the cameras and decide whether they want to accept bets from them? Seems a rather daunting and illogical task if you ask me.