This is how people opt in to Beiko hang texts, on a hang’s page at go.beiko.app. After joining, the person receives this confirmation text: Beiko: You're in for [hang name] - [day time], [place]. Details + who's going: go.beiko.app/g/[code] Msg&data rates may apply. STOP to end, HELP for help

The consent checkbox on the form (unticked by default): "I'm 18 or older. Text me about Beiko hangs. Recurring texts; frequency varies." Button: "I'm in". Under the button: "Msg & data rates may apply. Reply STOP to end, HELP for help. Terms · Privacy" (links to beiko.app/terms and beiko.app/privacy). Fallback on the same page if Messages didn't open: a mobile-number field and a "Text me" button; the person replies YES to one confirmation text.