i figure for the few bucks it cost and light weight it was worth adding to gear??
i did mention in previous  post, but you could take it in tent at night if you wanted to and use for "personal" alarm in event of unwanted nighttime visitor??
it's much louder than you could yell and the noise is something the "visitor" would have no knowledge of, so to me it would seem to be that much more effective??
i also can see it as a "signaling" device in event of emergency??
i carry a Fox 40 rescue whistle which is quiet loud, but i think this alarm tops that!!
other than being attacked personally, losing your food especially at start of trip would be a terrible loss of scarce and valuable tripping time!!!