I actually don't have much need for rules. I have my whole save data backed up, so after someone has visited, I can simply inject the backup copy. I do this on a regular basis to ensure any desired consistency of my town.
But I obviously disapprove, nonetheless, of anyone who attempts to steal from me or ruin my town in any way.
But I obviously disapprove, nonetheless, of anyone who attempts to steal from me or ruin my town in any way.