Refusing money: real integrity?

I noticed something interesting in a story about a political protest by Buddhist monks in Myanmar. Apparently the monks, disgusted with the country's current military government, are threatening to cut off any contact with the military and refuse to accept alms (charitable donations) from them. According to the New York Times, for a monk to refuse the military's charity would be "a humiliating gesture that would embarrass the junta."

How many Christian organizations, ministers, and missionaries have the courage to protest oppression by refusing to accept money from those who perpetrate injustice? At least according to one interpretation, that is what is happening in 3 John 5-7: "Beloved, you do faithfully whatever you do for the brethren and for strangers, who have borne witness of your love before the church. If you send them forward on their journey in a manner worthy of God, you will do well, because they went forth for His name’s sake, taking nothing from the Gentiles."