>None of what you've said is true.

Everything I said is true.

>Deterrence is known to have a very limited effect on behaviour.

It is insanely effective when actually enforced. It's not effective when the goal is to make it seem ineffective so that people can evade the system.

>In this case, it's far simpler to prosecute the source.

The "source" is a tool that tomorrow can be in Russia or CHina and you can't prosecute.