Well....I'm not so sure I'd want someone I didn't know showing up at my door. I like my house super neat and tidy the first time someone meets me, and a surprise would not allow me to do that. (of course the second time you would visit would probably be a shock since the house would look more like my 'norm').
Now, if it were a scheduled meeting where we'd all be meeting to exchange that would be a different story.
Does that help, LaQuita?