@mix and @cameralibre another thing we experimented with were pronoun stickers and also country flag / language stickers for the volunteers. I think the pronoun sticker was just used in a single space (how mozfest is divided) once, don't know if more people used that. We had that at another event IIRC. The language stickers still in use by volunteers. This makes more sense in an event with 1000+ people where finding someone who speak your native tongue helps a lot. The no-photo lanyards are quite common at Mozilla events though.