I think that
if ($1- iswm *#ChannelName*)should be
if (*#* iswm $1-) or even
if (*#ChannelName* iswm $1-) (for only one chan)
But the best code for me to check if someone advertises a channel is to "analyze" if # character is the first char of a word.
ex. if someone writes *^&*&*
#(*^(^, he doesn't try to advertise a channel
. So with tokens identifiers split the $1- in words and check the word that has the # character if it is the first character on not
