Software developers often use publicly available images to train their recognition systems.

The practice may be legal, but some experts believe it’s not ethical.

“That’s a particular concern for minorities who could be profiled and targeted.

Many portraits of diverse people on in front being scanned by facial recognition technology.

Dimitris Otis / Getty Images

Furthermore, users don’t necessarily consent to get scanned every time they go out in public.”

It looks for Flickr usernames and photo IDs.

Companies are hoovering up images to power their software projects.

An illustration of facial recognition technology.

izusek / Getty Images

The fact that these photos are used without people’s knowledge is a significant privacy violation.

“But that means the private industry is superseding the government in experience and access.”

Users who want to keep the photos they have already posted online private have limited options.

A group of graduates taking a smartphone selfie with facial recognition enabled.

PeopleImages / Getty Images

“But of course, youve got to be dedicated and moneyed.”