I saw this article from The Alliston Herald (town of Alliston, in Ontario, Canada) about false alarms. The small business owner faced a break-in and didn't have his alarm monitoring company call for police responders because he assumed it was a false alarm. He believed it was false because he had faced what he believed were two false alarms in the past few weeks. Now he suspsects that those recent false alarms -- which occurred at about the same time as the real break-in -- weren't false at all, but were early attempts on the business and might have been used to case the store or to numb him to his alarm system. It gets murkier, because the business owner was concerned about being fined this most recent time if the alarm had proven to be "false", like the previous alarm incidents at the business.