100%

I'd argue that unspoken rules apply even more strongly in actual outdoors setting, because a good number of those norms actually have serious consequences when violated. Anybody seriously hiking or offroading gets to save a non-zero number of behinds of people who ignored those rules, every single year.

And they also know they need to rely on those rules, because they might get them out of trouble too. The outdoors is not always friendly.

The "No speakers" thing is just the "let's try not be an ass to the same person who might need to pull me out of a ravine next" part of the rules.