Question: "Should we allow false teachers into our home?"
Answer: In relation to false teachers, 2 John 10-11 tells us, “If anyone comes to you and does not bring this teaching, do not take him into your house or welcome him. Anyone who welcomes him shares in his wicked work.” The Apostle John is referring specifically to bringing a false teacher into your home in the sense of giving him a place to stay. Allowing a false teacher to stay in your home and “set up shop” in your home is wrong. To do so would be sharing in his wicked work.
Although many have tried to apply it to those coming to our doors to spread their own brand of the gospel, this verse does not specifically command against allowing a Jehovah’s Witness, Mormon, etc. to come into your house for a visit, or allow such a person who happens to be a friend or acquaintance into your house. The focus is on giving such a person a “base of operation” from which to spread their false teaching. We should always be wary about even allowing a false teacher into our home in that sense, but we are not necessarily commanded to prevent a false teacher from stepping foot into our home.