@edgarblythe,
Once some years ago, I was in a building where the alarm went wild (not my fault) and the police came. I think the first guy's gun was drawn, but that part is a slightly faded memory - anyway, the police were in serious mode.
Some years after that I was working a deadline, left the building for a quick snack, and came back in, now the only one in the building. I did something wrong with the alarm, and just as I got upstairs to our design studio, all hell broke loose with major noise. I froze. Looking out the window, the black night was foreboding. I went downstairs rehearsing what I would say to the police. Somehow the noise stopped (me? or the mechanism?) but it had been on for quite a while. No police. I went back to work.
But after those first and second experiences, I'm chary of me and alarms.