Online age checks are on the rise in the U.S. and elsewhere, asking people for IDs or face scans to prove they are over 18 or 21 or even 13.

“In places like Australia and the U.K., there is already a split happening between the internet that people who are willing to identify themselves or go through age verification can see and the rest of the internet. And that’s historically a very dangerous place for us to end up,” said Jason Kelley, activism director at the nonprofit digital rights group Electronic Frontier Foundation.