Sample policy (edit as needed)[]

Do not photograph, video, or audio record anyone at (conference) without their express permission, explicitly sought or given in advance. Most attendees will have (some visible marker) showing their preference for photography or recording:

Green: Photographs always okay
Yellow: Ask before photographing
Red: Photographs never okay, don’t ask

If no (marker) is visible, assume "ask before photographing."

Suggestions for photography permission markers[]

Wide lanyards of different colors (visible from all directions)
Different badge colors (only visible from the front)
Large stickers on badges (difficult to see and only visible from the front)