Earlier quoted context omitted.
You do go to jail, usually just court house holding, for contempt of court. That doesn't mean your due process rights disappear. You can challenge the warrant and the applicability of the All Writs Act all the way to SCOTUS. You can even still file a writ of Habeas Corpus. You can even say that you forgot how to make the modifications. The onus is on the DOJ to prove you haven't. Awfully hard to prove what's in a man…
Anybody who actually went to jail for conscientiously objecting to this would be making one of the smartest moves possible in their career. They'll go down in the history books, their jail time will be minimal, and they will be a celebrity / employable in the security community for decades.
An equally likely outcome is that we lose, they end up known in the future in the same light as Guido Fawkes - you know, that guy who fought for freedom of religious association and an end to oppression based on your flavour of christianity some three hundred years ago, who we still get children to burn in effigy every year.
Or more likely they're completely forgotten and ignored, and our grandchildren can't even imagine a world in which your boss doesn't know your most intimate personal details, for the word "private" no longer exists.