You are being needlessly triggered, to the point that you're not parsing the thread well.

1. I didn't say I do this. It's not my problem.

2. You're exaggerating by saying "everyone else's problem". As is clear from the thread, only certain people view it as a problem.

I also don't like people taking selfies on trails. But I know how not to have my contentment be affected by minor problems.

Learn to share the trail and live with others different from you.

No. Your first sentence is framed from the point of view of your own experience. Regardless, I will not tolerate sound pollution like this. It's one thing in the city, where noise is chronic and endemic. Bringing that into a natural setting is simply inconsiderate of others, and it is the inconsiderate person who must change their behavior, not the people who are being imposed upon.

This position sounds dysfunctionally non-pragmatic. What does not tolerating sound pollution like this look like to you? In what ways can you possibly enforce your will in such a situation that doesn't immediately turn you into a hypocrite?