Very few countries require consent in public and some that do, like France, make exceptions for art and other non-commercial photos.

But, we’re not talking about some commercial photographer taking photos in public. We’re talking about an NGO who wants to snap photos anytime while people are doing their work. It’s absurd to think they can stop everyone every time to get some snaps.

Trust me it’s not worth having that one or two people working with their special requirements. A blanket waiver saves tons of time and hassle.