Even if a court ruling or legal interpretation gets overturned later, that doesn't allow you to prosecute people who were relying on that legal interpretation.
Judges aren't mindless machines and they realize the importance of avoiding postfacto prosecutions.
and below still stands:
>There's other things that can be done as well, like searching their residence for every single code violation possible, daily police visits, civil asset forfeiture, fine-comb tax auditing, etc. It's a pretty well oiled machine for finding ways to convict people or make their life hell through the legal system if that's the goal.
If the powers that be want to punish those who contribute to abortion, they will find a way to do it, even ex-post-facto.
In that case there is no room for crypto. Totalitarian regimes can execute anyone suspected of holding it.
There's a lot of room to re-interpret laws that were already on the books in ways that make prior "crimes" illegal today when they wouldn't have been interpreted that way when they happened.
There's other things that can be done as well, like searching their residence for every single code violation possible, daily police visits, civil asset forfeiture, fine-comb tax auditing, etc. It's a pretty well oiled machine for finding ways to convict people or make their life hell through the legal system if that's the goal.