These things are a bit like asking, "Would you give your life to save someone?"
Everyone wants to answer "YES!" but no one knows, or can even begin to tell him/herself the answer until that point comes and they're faced with the moment of choice, however it happens to present itself.
FROM MY COLD, DEAD HANDS!!!! (I think, I mean, for sure! Right? Unless, well, I've got my family to think about, but absolutely! Well...I guess it would depend, what kind of registration is this? A really bad one, or just incremental? And am I the only one resisting, or will lots of us refuse? Can I hide in the mass of non-complaints or are they going to actually come and arrest me? I can't afford to be a test case or to go to prison. What about my kids' college bills? ... I guess I'd have to wait and see...Etc. etc.)
There will be a lot of big talk, but probably not many will actually see the prison door slam shut behind them over it.