I will meet people in town, but that's 30 miles from here- so it had better be a big sale, or coincide with my weekly town run.
I do answer the door, even if I don't know the person, with my .45 on my hip and two guard dogs jumping vertically higher than my fence. I've never had a problem getting people to leave, and even if DH is here, I'm usually the one who answers the door.
I get people stopping on the road and sometimes pulling in just to stare at my yaks, so I'm pretty used to it. I answer their questions, but don't let them stick around forever.
We haven't sold anything here on the property, and we've had chickens go missing- just the cost of being on a paved country road that gets decent traffic, I suppose. We may put up game cameras as our next project.