It seems even having a passive interest in computer science or cryptocurrency would inevitably lead to one taking a class or buying a book on these topics. The business person in me always brainstorms the various potential business applications of any technology -- and that inevitably leads to a lot of discussion.
Any system of policing that results in entire professions and swathes of hobbyists being considered and treated as enemies of the state is essentially the same level of injustice as the witch trials of old and shows our species has not improved all that much.