in the usa heroin and meth are super illegal and people are using the fuck out of them
many 80s pc video games only survive in a playable form because of a very illegal system of organized copyright infringement that removed copy protection mechanisms; people used the fuck out of that too
in the usa gay sex was super illegal until, in many locations, 20 years ago. guess what gay people did
"if it's illegal people just won't use it" is clearly not correct; i think it's what dave chappelle would describe as an extremely white thought
the problem is if the design of the system provides law enforcement a bottleneck they can use for leverage against righteous lawbreakers