Since my CCW weapon is on me 98% of the time Im awake its not too difficult a choice.
If Im expecting a package then I open the door and sign for it, if Im not than I answer the door with my foot and knee bracing the door. More then likely the Fedex guy is looking for one of my neighbors...
If its yo homes and the crew it will be dealt with with or without force depending on how the situation evolves. If they simply leave then its a call to the police, if they attempt to break in by force or attempt to over power me then Im looking for the elements the law requires.
Most likely it might require deadly force but I dont want to assume automatically that it would.
If it requires deadly force then I do my best to stop them with the minimum force necessary to stop the life threatening immediate attack.