Dorothy Hansen used to pay her taxes faithfully every year - until the U.S.-led invasion of Iraq in 2003. Since then, the 87-year-old Sebastopol resident has stopped filing her income tax returns to show her disapproval of the war. I am very sure that I don't want to have any part in killing people and I certainly don't want a part in any wars that do just that," Hansen said. With the tax-filing deadline just two weeks away, some... are using it as an opportunity to protest the war by withholding their tax dollars to fund it. Known as war tax resisters, they consider it an act of civil disobedience. Some withhold only a symbolic portion of what they owe - $10.40, for example, to represent the 1040 tax form - while others, like Hansen, refuse to pay anything at all. Many will redirect their tax dollars to a charity of their choice. The risks can be costly if a resister is caught. Some resisters have had their wages garnisheed or property seized. Jesse Weller, an IRS spokesman, said the agency does not keep statistics on war tax resisters. The National War Tax Resistance Coordinating Committee ... said they have no way of tracking their numbers either. Weller said the IRS goes after promoters of tax resistance more aggressively than those who participate in the movement and warns that anyone who gets caught can face a criminal or civil penalty. Nonetheless, war tax resisters persist. Hansen said she will stand by her beliefs regardless of the consequences.