The Freegans Phenomenon.

Freeganism is the practice of reclaiming and eating food that has been discarded. Freegans and Freeganism are often seen as part of a wider "anti-consumerist" ideology, and freegans often employ a range of alternative living strategies based on limited participation in the conventional economy and minimal consumption of resources.

Freegans "embrace community, generosity, social concern, freedom, cooperation, and sharing in opposition to a society based on materialism, moral apathy, competition, conformity, and greed."

The word "freegan" is a portmanteau of "free" and "vegan"; not all dumpster divers are vegan, but the ideology of veganism is inherent in freeganism. Freeganism started in the mid-1990s, out of the antiglobalization and environmentalist movements. The movement also has elements of Diggers, an anarchist street theater group based in Haight-Ashburyin San Francisco in the 1960s, that gave away rescued food.

I think that it's a great thing to do, instead of buying food from the store they eat what people throw away in the garbage.