I have also heard the real Biden door knocking intruders are recording conversations for those stupid enough to engage them.
I will just yell through the door that I have had the virus and have natural immunity. I will follow that with ""What? What? What?" and after enough of that then will reply to any questions with my questions. I will repeat until Biden's goon squad loses patience. I would do it all day long laughing my ass off.
https://freerepublic.com/focus/f-chat/3976205/posts
The Deputy US Marshal (retired) has a great response.