I think there are two ways to tackle bots while moderators are not in.

1) Allow players to open new (and higher level) tables, at the moment, this is not possible, at least when I tried.

2) Have 1-point tables, as bots never get any points, having a 1-point table will stop them from sitting in, while making it accessible to most. The newbies can still sit at 0-level tables and as soon as they have some points, they can sit in the 1-point table. This, i believe is the most effective way to tackle bots.

Please vote and give your ideas.