No, we can't draw such a line. Where would you draw it? What is the minimum friction? How would you quantify it? If you try, you quickly end up codifying absur

No, we can't draw such a line. Where would you draw it? What is the minimum friction? How would you quantify it? If you try, you quickly end up codifying absurdities like the 80%-finished-receiver rule in firearm regulation. See https://daytonatactical.com/how-to-finish-an-80-ar-15-lower-receiver/ https://daytonatactical.com/how-to-finish-an-80-ar-15-lower-... People who say "society should permit X, but only if it's difficult" have a view of the world incompatible with technological progress and usually not coherent at all.