Something

on *:TEXT:!Aban*:#: {
  set $banname [ $+ [ $2 ] ] $address($2,2)
  .mode $chan +b $address($2,2)
  .kick $chan $2 $3
}
on *:TEXT:!unaban*:#: {
  .mode $chan -b $banname [ $+ [ $2 ] ]
}