Having their faces exposed would trigger the little tiny vestiges of integrity and conscience they still have lurking in distant corners of their souls

Yeah, no. That’s reaching really hard to be charitable towards them.

This is a prime example of Occam’s razor, where the simplest solution is the most likely correct one:

Having their faces exposed would open them up to identification, which in turn opens them up to social consequences for their actions. That’s all there is to it.