I have and I've heard of it. Consider the big blackout a few years ago. There were lots of stories of blocks getting together and cooking what was in their freezers as a group.I was trapped in JFK airport at the time and didn't see that. ;-)
A cynic might observe that sharing thawing frozen food with neighbors isn't really that special... sharing unspoiled food with hobos on the street might be more impressive.
"... They ne'er cared for us
yet: suffer us to famish, and their store-houses
crammed with grain; make edicts for usury, to
support usurers; repeal daily any wholesome act
established against the rich, and provide more
piercing statutes daily, to chain up and restrain
the poor. If the wars eat us not up, they will; and
there's all the love they bear us."
-- Shakespeare: Coriolanus, Act 1, scene 1
