Many years ago, we had one residential alarm installer in the Seattle area who would offer free "prewires" for security systems to home builders. The hope was that a percentage of the new home buyers would choose the company who did the prewire to install and monitor the alarm.
For a several month period, someone was going around to these homes just after these prewires were completed and sabotaging the wiring. The damage was done in a subtle way so that it wouldn't be noticed until after the home was completed and someone tried to connect the devices.
It was suspected (but never proven) that this sabotage was done by a rival alarm company working in the same area.