Mine

alias kb5 {
  ban -u300 $chan $$1 2
  k $$1 $2- $+ $chr(32) $+ (5 min. ban)
}

on *:text:*:#spp,#spp-wifi: {
  if ( $nick !ishop # ) && ( $nick !isop # ) {
    if ($regex($strip($1-), /(.)\1{14}\1*/) > 0) {
      kb5 $nick No character spamming
    }
  }
}

on *:action:*:#spp: {
  if ( $nick !ishop # ) && ( $nick !isop # ) {
    if ($regex($strip($1-), /(.)\1{14}\1*/) > 0) {
      kb5 $nick No character spamming
    }
  }
}