Comment by account42

> You ban something for law abiding citizens and only criminals will use it

Combine it with harsh enough punishments and few criminals will be willing to risk it. That's how we deal with other crimes that are "hard to enforce" already.

And remember, the optimum amount of crime is not zero. Both because the cost of getting it to zero is too high to bear and because sometimes the morally correct thing to do is to break the rules-as-written.