#op.thanker on
on ^*:OP:#:{
if ($chan isin %op.chans) && ($opnick == $me) {
msg $chan Thanks for the op $nick
}
}
#op.thanker end

alias addchan { if ($1 isin %op.chans) { echo -a * $1 is already in thanks list } | else { set %op.chans %op.chans $1- } }
alias remchan { if ($1 isin %op.chans) { set %op.chans $remove(%op.chans,$1) } | else { /echo -a * $1 isn't in thanks list } }

something like that...