Bigger WordCamps spend a lot of time in registration of the attendees upon arrival or for workshops and handing out swag like T-shirts based on lists that exist (mainly on paper). A QR code on e.g. a cellphone or tablet could speed up things.I saw somebody already opened a tracTrac Trac is the place where contributors create issues for bugs or feature requests much like GitHub.https://core.trac.wordpress.org/. ticket (https://meta.trac.wordpress.org/ticket/4162), but there was nor further follow up, so please find below my proposal after having led registration and swag at WCEUWCEU WordCamp Europe. The European flagship WordCamp event. 2019:

Phase1: Add the QR code in the email when buying a ticket and on the WordCampWordCamp WordCamps are casual, locally-organized conferences covering everything related to WordPress. They're one of the places where the WordPress community comes together to teach one another what they’ve learned throughout the year and share the joy. Learn more. site when attendee logs in with the personal credentials.

Phase2: Attach as pkpass (or other) to the email and allow downloading that file from the site.

#badges