I would be very wary of stealth sbd patching...especially if you are the only or there are few tapers present.
also, remember that the sbd is mixed for that particular room, not for recording!
fyi, a few years ago after the band I work for stopped sbd patching, we noticed that the house sound guy had patched a deck from the sbd...ever since we purposefully turn down all sbd feeds in case someone else gets a stupid idea into their head of sneaking a sbd patch