As other noted, this is not a good idea. Ask permission first should be used as a standard and for cosplay or different fanwork photos, if people can't be reached, there should be a norm on how to anonymise. Fans in Japan and other East Asian countries have informal etiquettes of blurring faces that could be a template.
This also conflicts with international laws such as the German "right to your own image" and other privacy laws. Making the picture distribution opt-out is possible something that would violate these laws, that even be punished with a prison sentence.
Someone familiar with German and EU laws should look this over and other privacy protection laws around the world should be considered in the overhaul of this policy.
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This also conflicts with international laws such as the German "right to your own image" and other privacy laws. Making the picture distribution opt-out is possible something that would violate these laws, that even be punished with a prison sentence.
Someone familiar with German and EU laws should look this over and other privacy protection laws around the world should be considered in the overhaul of this policy.