Spoofing, that looks eerily similar to a challenge entry of mine from a while back (http://forum.swiftirc.net/viewtopic.php?f=35&t=13872&start=32)

we can keep it nice and simple with:

alias nobbcode if (],[) return $($!remove($1, $replace(#$1,[,],],$v1) ),2)

but it's certainly not as general purpose as others since it will mess up if $1 contains members of mirc's syntax