(Vancouver residents know what I'm talking about. *sage nod*)

So my policy of "if you're bitten, off you're written" isn't working as well as I would have hoped. Choosing to Dismiss all survivors who've been bitten doesn't seem to be effective.

1) When someone is dismissed, they remain in the Survivors list accessible with the U key.
2) When someone is dismissed, they remain in their last mode. In the case of the eponymous Gregor, he was in Guard mode, so he remains guarding my hideout and eating my food in spite of not officially being part of my group anymore.

Using the Survivor Info context menu item verifies that he is in fact part of the "nil" group ID, but that his role remains "Guard".

A feature to be able to tell anyone to "Get off our property!" ("my" property if you're the only member) would be very welcome, available if you're the survivor group leader and the person is in your designated base area. If they re-enter your property, your faction will go hostile to them.