I think the reason Food Not Bombs has been harassed so often by "the authorities" is because they are undermining capitalism by practicing other-oriented altruism.

The essence of capitalism is psychopathic, primitive "me first" enforced by "might makes right" which is the Law of the Jungle

the essence of socialism is healthy and sane other-oriented altruism which is giving without expecting payment.

Google "Gift Economy" by Genevieve Vaughan to understand that a new world IS possible, based on kindness, compassion and altruism—the anthisis of psychopathic greed (capitalism)