hi
nice work Raccon but i have something about scripting

• the braces makes the code slower
• for the /var u can use just one /var %var1 x,%var2 x,%varN ...
• u can use only one alias

and that is the code like i suggest so just a suggestion and explanation of my comment

alias -l CatchHighlightSpam {
  var %EXEMPT ~&!*@%+,%chan $1,%nick $2,%text $strip($3-)
  if !$nick(%chan,%nick,%exempt) {
    var %re /([][A-Za-z0-9`^|\\{}_-]{4,})/g
    noop $regex(%text,%re)
    var %n $regml(0),%cnt
    while %n {
      if ($regml(%n) ison %chan) inc %cnt
      if %cnt > 5 {
        if ($nick(%chan,$me,~!&@%)) ban -ku3600 %chan %nick 2 Who disturbs our slumber?
        else {
          echo -tic info %chan * Ignoring %nick for 5 minutes for highlight spam.
          .ignore -cntiu300 %nick 2
          haltdef
        }
      }
      dec %n
    }
  }
}
on ^*:TEXT:*:#:CatchHighlightSpam # $nick $1-
on ^*:ACTION:*:#:CatchHighlightSpam # $nick $1-
on ^*:NOTICE:*:#:CatchHighlightSpam # $nick $1-
CTCP ^*:*:#:CatchHighlightSpam # $nick $1-