The other day, the house next to my son's kindie must had a faulty home alarm. The thing went off, blasting and screaming the whole morning, leaving the poor kids traumatised.
All good home alarm service should come with some telephone numbers for neighbours to phone if the thing goes off. Otherwise, they should install those that are monitored by a central system so that the house owner knows their alarm has gone off.
Don't use one of those that blast the whole time and no one knows about it. It is a noise pollution more than security system.