The lady interviewed by Tucker did two things wrong, IMO. She never asked for identification (she called the local FBI office later to verify they had indeed pounded on her door and intimated her)...and she let them into her house.
Don’t let them in, and ask for ID, for starters. Any other recommendations from FReepers?
See 35 below your comment.
Tell the FBI you are recording the interview. From what I have read, they leave.