Always mask in places that vulnerable and high risk people can’t avoid!
In other words, mask everywhere. The immunocompromised are all around you! They have to work, they have to go to school, they have to get groceries, they should not be forced out of their social circles and hobbies and into isolation at best, or killed at worst, for the comfort of reckless ableists. Children who cannot mask should not be forced to become ill! The destitute and homeless who can’t afford masks should not be forced to become ill!
There's a pretty big leap between "Most posting happens during work hours" and "Many federal civil service workers spend most of their workdays complaining about their jobs on Reddit." It's not like it matters if people are shit posting at work all day anyways but their data doesn't even back up what they are saying.