Again, it cuts down on waste, and its not just the environmental reason but an anti-consumerist protest against buying food you're not going to eat and throwing it all out, and charging an arm and a leg for food people need.
Anyway, organizations like Food Not Bombs does get a lot of work done, last summer here they gave away a lot of free food. Its not an individualist thing, sharing and community is a big part of it too.
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