For websites, verifying users’ age is virtually impossible, Jackie Snow writes in The Wall Street Journal. Snow’s report cited a web survey conducted by researchers at the University of Strathclyde in Glasgow, who found the most common method of age verification is to have users check a box that declares them as age 18 or older, which they called “verification theater.” One possible solution was creating age tokens with QR codes where a user would have to upload their driver’s license to verify their age.