It’s an unlikely situation and hasn’t been reported to us. But to overcome the possibility of somebody unwanted doing this you can enable GPS validation within the app. This means it will only work when it’s scanned by somebody close to your front door.
With GPS enabled, the visitor will need to accept giving their location (appearing as a pop-up request on their phone). It’s a minor extra task – but we recommend having GPS validation turned-off unless you really need it.
In addition, after calling from a Talk2Me the visitors browser automatically moves away from the calling page, with no BACK option. This also helps prevent unnecessary calls.