Nonetheless, war tax resisters persist, emboldened by the fact that it is probably too costly for the government to come after them. Hansen said she will stand by her beliefs regardless of the consequences.
"I have paid for taxes -- I have helped to pay for wars before," she said. "I've never felt good about that. It was the invasion of Iraq that pushed the button for me."
Elizabeth Boardman, 65, of San Francisco plans to withhold 41 percent of her taxes this year, a number she estimates the government to be spending on the military from its total budget, excluding what it pays out to war veterans.