Offer an option for an audio alert that can be heard outside the car when sentry mode is triggered.
Currently, when triggered, the screen appears and the external lights flash. This may not be enough to warn someone nearby. An audio alert would further reinforce that Sentry mode was triggered. It might even have a verbal warning like “Please be careful – video recording in progress”.
This could prevent damage by people unloading stuff out of their cars and causing dents.