Forgive the machine translation to English, but reading that shows the a very similar exception to privacy protection we have here in the USA
Here's one example:
"There are exceptions to events (demonstrations, general meetings, cultural events, etc.). Here, participants must expect to be photographed. This is about what is happening and not about the person itself. "
Most of the wiki article is talking specifically about copyright, which isn't the scope of what we're talking about. Publication of taken images is a different topic.