The Internet also came about in your lifetime. How do you reasonably propose to effectively enforce a law against the electronic importation of pornography without undermining the Fourth Amendment or severing all Internet connections to the outside world?
"How do you reasonably propose to effectively enforce a law against the electronic importation of pornography without undermining the Fourth Amendment or severing all Internet connections to the outside world?"
As I have said several times, and as you continue to ignore (which is no surprise because it is fatal to your argument) it doesn't matter to what degree such a law can be enforced.
It doesn't matter if it's only enforced when somebody's wife turns him in, or when he's stupid enough to download porn at work. It doesn't matter if we only catch one person a year.
No matter what difficulties are encountered in enforcement, the law must exist because legalization constitutes endorsement, and no moral society can endorse pornography.