Well, the isvoice isn't necessary if he's only worried about the ops. And if he wanted to have it not work for ops and voices, then using isreg would be better than 2 if checks.
Also, that only helps if the op's clones are all ops (or voices if it's set to not trigger for voices). To have it not work for all of the clones, you'd have to check the $address of the person who triggered the script and compare it to the $address of every op in the channel (or you can have a list of ops' addresses if they don't change and compare it to that).
