I was referring to the suggestion of turning off beeps in the options and adding them back for every channel other than the ones you are interested in. Something like this:
Code:
(beeps off in options)
on *^:INVITE:*:{
if ($istok(#one #two, #, 32)) { join # | haltdef }
else { beep }
}

instead of being able to use the built in channel matching like:
Code:
(beeps on in options)
on ^*:INVITE:#one,#two:{ join # | haltdef }

My point was, in the first one you're modifying behavior for every possible invite event, not just a few.