Comment by saghm

They're implemented in a way that people who don't ever buy alcohol or cigarettes get effected by though. I can't feasibly opt out of the entire internet that I use to pay bills, schedule doctors appointments, file taxes, etc. because hypothetical children could use them to access completely unrelated things to those boring parts of my everyday life. The equivalent would be if I got carded every time I stepped out of my house just in case I might decide to buy alcohol later.