The latest updates to GateKeeper offer a wide range of interactive flagging options. This allows homeowners, admins and guards to flag users discreetly to highlight any important issues. It might be something positive like warning about any medical issues or to add important notes for your family or friends. However it can also be used to highlight potentially troublesome visitors like estranged partners, unwelcome visitors or banned vendors. Guards are not only able to see any comments from homeowners but also add their own notes so other guards can see these too. There is no substitute for a diligent guard of course but this feature is an important tool in ensuring the community info is effectively pooled to help guards do their work to the best of their ability.