Having done a fair share of media work on and in German protests myself: the biggest problem is that video evidence can and will be used by cops to go after activists - and that includes material from way outside a riot scene, given that police also look for such tiny details as shoes to (attempt to) identify people. The people at such events have something to lose: careers, families, friendships, years behind bars.
In contrast, in countries like Turkey, Belarus or other dictatorships, where the fear is getting killed regardless of protests, the situation is different - people on these protests want their faces to become public so that they cannot be "disappeared".
In contrast, in countries like Turkey, Belarus or other dictatorships, where the fear is getting killed regardless of protests, the situation is different - people on these protests want their faces to become public so that they cannot be "disappeared".