In search engine parlance, the “bounce” rate is the percent of searchers who click on a search results link and then immediately hit the back button … I’m going to analogize bounce rates to the rate that consumers fail to overcome age authentication walls, which I’ll call the “balk rate.” …

https://blog.ericgoldman.org/archives/2026/05/how-often-do-consumers-balk-at-doing-online-age-authentication.htm