I think it's more likely that people who refused to support their country would lose certain privileges. There was a time when only rich men or those that undertook military service could vote.
Most people don't realise that signing up for the draft (selective service) is already a legal requirement for US males. Whenever I've seen it raised on here (usually to point out that the system doesn't always privilege men) people say that it's just a formality and we haven't had a draft in decades. However, I'd be less nonchalant as a male having signed on the dotted line in light of recent world events.
Selective Service System registration is required by law. By registering, a young man remains eligible for jobs, state-based student aid and employment in most states, Federally-funded job training, and U.S. citizenship for immigrant men.
A man who fails to register may be ineligible for opportunities important to his future. He must register to be eligible for state-funded student financial aid and employment in many states, most federal employment, job training under the Workforce Innovation and Opportunity Act and U.S. citizenship for immigrant men.
If required to register, failure to register is a felony punishable by a fine of up to $250,000 and/or 5 years imprisonment. Also, a person who knowingly counsels, aids, or abets another to fail to comply with the registration requirement is subject to the same penalties.
www.sss.gov/