This command sets the number of bans allowed in each room's ban list. The default is fifty. A network operator can add bans even if the ban list is full.
/as security set maxbans 30
Bans are an important part of room maintenance; they allow the room operators to keep out users who cause problems. Larger ban limits give room operators more space to deal with problems, but use up more database space. Smaller ban limits use up less space and encourage room operators to be more efficient with their bans, but may be too restrictive. If your network has services then a small ban limit may encourage more akicks to be set.