I think It would be silly, to add the shitlist script to the admin itself.
This script is old, so the alias might be wrong, someone just edit it if its incorrect/bugged.
;NOTE: set all or your forbidden/banned/whatever names in shitlist.txt in the same dir as mirc.exe
on *:SIGNAL:mta.join:{
if ($read(shitlist.txt,w,$mta.name($1,$2))) {
mta.say $1 $mta.name($1,$2) Kicked Reason: bad-nick
mta.kick $1 $2
}