I'd agree - your neighbors are enjoying you being stressed about something so dumb.
In any case, the worse thing would be a fine - no one is arrested for something like that.
To ease your stress, I would do as punkey suggests - call your local police. They can let you know if there is even a fine (which I doubt). I would imagine for something so minor, the police would come over and talk with you first to see if you could disarm or change the alarm if it was really that bad.
If you neighbors even filed anything or logged a complaint with the police, you can get this information. You might have to go to the station, but you can get a copy of whatever they complained about. (from personal experience as I once had a crazy neighbor and had to deal with stupid crap like this many years ago).