They would likely require people to upload multiple photos to build a profile to "opt-out" and even then there are FPs and look-a-likes that make such an opt-ou

They would likely require people to upload multiple photos to build a profile to "opt-out" and even then there are FPs and look-a-likes that make such an opt-out hard to guarantee (e.g. identical twin where one opts-in and one opts-out)