I don't want to hear air horns going off either (false alarms), but I can understand the concern about being alerted if a nuisance or God forbid a predatory bear is coming into camp?

I've mentioned my little personal alarm set-up before. It's basically a jogger alarm that takes a 9v battery and is about the size/weight of a deck of cards.
Pull the lanyard and it sets off a sound like smoke detector.

Beauty of this set-up is with a little ingenuity it can be rigged to hanging/stashed food packs in such a way that only a big critter like a bear could set it off, no false alarms.
You could even rig it with some fishing line like a perimeter trip wire set-up.
Keep the trip line high enough off the ground so little critters wouldn't set it off.

Keeping a clean camp is very important and since 99+% of bears are just looking for a free meal, that is the best defense against losing a food pack.
For that small % of bears that see YOU as the meal, then a early warning of their presence, especially at night might be helpful.

I'd still get  a can of good bear spray, one for each tent in party. Cheap insurance IMHO.

I'll bet that biologist that used if effectively to avoid a mauling/death won't say "What's the odds of that happening again" and go without it next time out. ::)

He'll pack a bigger can next time I bet.