
Facebook's decision comes after Ireland's data protection commissioner scolded the company for violating users' privacy.
The self-imposed ban applies only in Europe.
Facebook claims facial recognition eases sharing.
But critics like Mui think it will "accelerate the creation of a de facto photo identification database long before anyone understands the ramifications."
With such a database, retailers could identify you the moment you enter their stores and begin badgering you with offers.
"Facebook's conciliatory moves in Europe will not stop the erosion of privacy but will, I hope, slow it," Mui writes.