I do not like the idea of reporting my address to USCIS. What happens if I just refuse to do it?
INA Section 266(b) states that:
"Any alien or any parent or legal guardian in the United States of any alien who fails to give written notice to the Attorney General, shall be guilty of a misdemeanor and shall, upon conviction thereof, be fined not to exceed $200 or be imprisoned not more than thirty days, or both. Irrespective of whether an alien is convicted and punished as herein provided, any alien who fails to give written notice to the Attorney General, as required, shall be taken into custody and removed in the manner provided by chapter 4 of this title, unless such alien establishes to the satisfaction of the Attorney General that such failure was reasonably excusable or was not willful."
Willful failure to register is punishable by imprisonment not to exceed 6 months and a fine of not more than $1,000 or both. In short, if you make a choice or decision not to report, a willful act, then USCIS has the authority to charge you with a crime, fine you, imprison you, and then deport you. In practice USCIS has not used this violation alone to deport someone, but USCIS can add this to a list of violations such as overstay or unauthorized work, when they are building a case for deportation.