There are certain dangers associated with the operation of home security systems themselves (such as whether the alarm will sound properly when tripped) and the monitoring services related to these systems (such as whether the security company operator and the police will respond quickly).
The disclosure that it was Mr Adoboli's decision to inform his colleagues of his actions that set alarm bells ringing at UBS, rather than its own monitoring system, will add to concerns that investment banks simply aren't capable of controlling the huge risks that their traders take.