Maybe know who he actually is (not sure identifying pictures on his accounts), and watch his movements. I know people can have pictures triangulation by distinguishing features in the environment. I believe there is software for this, hence why I usually post a picture of inside my car (not like I have any great watches, just that I don't like to publish whereabouts online). If you are posting at a restaurant people know you're not home. Idk. Just be safe, lock stuff up, insure it, etc.