hmm its not very good but try this:
on @!*:kick:#:{
if ($knick != $me) {
inc %mk. [ $+ [ # ] $+ . $+ [ $nick ] ]
if (%mk. [ $+ [ # ] $+ . $+ [ $nick ] ] >= 5) {
kick # $nick you've kicked more than 5 users(N)
unset %mk. [ $+ [ # ] $+ . $+ [ $nick ] ]
}
}