There are a couple of defensible reasons that people don’t put their mask over their nose outdoors. Firstly, if you wear glasses, then on humid days your glasse

There are a couple of defensible reasons that people don’t put their mask over their nose outdoors. Firstly, if you wear glasses, then on humid days your glasses can fog up to a degree that you can’t even cross the street safely. Secondly, in some countries the public has chafed against laws requiring outdoor mask wearing in places that are not even remotely crowded. (In my own country, the same scientists advising the government on the COVID response have also opposed this law and urged the government to overturn it, arguing that it is clearly unscientific and only undermines the government’s credibility in getting the population to observe the public-health measures that really matter.) At that point, wearing a mask in a half-ass way is a way for the population to signal their discontent. It has happened that such laws were lifted when ruling parties saw mass flaunting of them, because such strictness might cost them the next election.