If you insist, you can obfuscate the script by removing all readable variables (%nick, %topic, etc) to %MO10Nl0M, etc, and doing the same thing with aliases, removing all comments, using { | }, and making the code do unnecisairy things:
Code:
%695876034765934754376342724263543534 = $41219344(%695876034765934754376342724263543534)
%695876034765934754376342724243543534 = $02413256(%695876034765934754376342724263543534)
%693876034765934754376342724243543534 = $24434367(%695876034765934754376342724243543534)
%695876034765934754376342724243543534 = $42131245(%693876034765934754376342724243543534)
%693876034765934754376342724243543534 = $53215435(%695876034765934754376342724263543534,%695876034765934754376342724243543534)
%695876034765934754376342724263543534 = $89516634(%695876034765934754376342724263543534,%693876034765934754376342724243543534)
...
alias -l 41219344 return $4566434($1)
alias -l 4566434 return $calc($1 + $4456634($1))
...


However, beware that a simple search and replace will defeat this, however it does look confusing.

Those who can, cannot. Those who cannot, can.