The example given was just an example - and in fact, an assumption cannot be made that the light-bearers were intentionally trying to interfere in a photo session.

It is entirely unreasonable to think that strangers on a mountain will account for a random photography project in their thinking. So the blame game doesn't make any sense whatsoever.

The onus of responsibility for having a clear shot, obviously lays with the photographer. Just because a photo is being taken, doesn't mean that others can't access the public space, too ..