A philanthropist is any person that tries to do good deeds to help other people, however, the label is typically applied to those who give substantial amounts of money to certain causes (often foundations, museums, or specific activist groups). The label is far from uncontroversial, as philanthropists are often accused of funding the wrong causes (e.g. funding art instead of fighting world hunger) or doing it for the wrong reasons (e.g. to avoid taxes or out of personal interest).
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Other bands that allow & encourage taping at their shows include: Phish, String Cheese Incident, Les Claypool Frog Brigade[?] and ...