In early February, Thadeaus Umpster found a free refrigerator on Craigslist. He intended to use the glass-door fridge, the kind you might find in a supermarket, to store donations for the weekly food share he helps run in Herbert Von King Park in Brooklyn. Just one problem: When he brought it home, it was too big to fit through the front door. He left it outside, within the small gated area in front of the Bed-Stuy brownstone he shares with