Let's stick to the physical analogy evoked by "keys", rather than get all tangled up in the noise that results from worrying about online communications...
Nomadic1 people can pay the postal service for a mailbox, and keep their own keys; while one of the most frequent complaints of lawn-owners is that some drunk [or vindictive] driver has knocked down their mailbox.
Footnotes
edited to replace "homeless" with "nomadic", and deliberately highlighting this in the footnote; I realise there's a complete venn diagram, and a third circle could be added by asking whether people lived this way by choice... still, the neutral adjective "nomadic" is probably more appropriate for this discussion, than the pejorative "homeless". ↩
Footnotes