Since we moved to the country, we don't get them much anymore. I just hated to answer the door when they would knock. We used to keep the screen door locked because they would open the screen door to knock. Then they are already halfway in. Much harder to get rid of them, that is until they see the dogs running at them. That convinced them to leave or at least shut the screen door quickly.

Good boy Simba!! Best alarm system in the world!