There is a third concern besides scale and linkage -- errors and accountability. Sometimes these services are wrong.

When they are wrong, and people get arrested, go to jail, or pay thousands in legal fees to clear themselves...there is no accountability. Sometimes, the law enforcement who use the systems rely ONLY on these systems, not on the underlyer data (e.g. images) to validate an arrest.

Minimally, the services should have to produce an original image/video when surfacing information that will be used for legal action. Secondly, the services should be held financially responsible for legal costs when mistakes are made.

https://www.nytimes.com/2020/12/29/technology/facial-recogni...