Again, I don't see how antivirus scammers are any different than other IRL scams such as lotteries (state-sanctioned!), ponzi schemes etc.
Cash transactions are no different from sideloading (on desktops we call this "installing") applications. They are between only you and the vendor, no 3rd party involved.
Sure, your parents are affected. But other people's parents are smokers, having their QALYs stolen by the tobacco industry. And yet all we do is add some nudges and hope they'll stop, nothing more.
This is hypocrisy.