A "pro-social mathematics" syllabus section with a "choose your antisocial adventure" game that gives them a fun way to figure out the boundaries (working with other people = pro-social; copying someone's answer = antisocial; using a chatbot for homework help = antisocial and parasocial).
I'm thinking of a "no phone challenge" conversation prompt or trivia question on the board before class. Eg: "Your professor's musical literacy ends in 2011. What's on the catch-up playlist?"
And trivia questions from the 1990s (my high school era) to compare with their high school era.
"Analog" events and activities in the math common space to encourage student foot traffic and help students meet each other.
Thinking about Antanas Mockus and Bogata: hire a mime to wander around math classes and the math common spaces to act out praise for pro-social, positive learning behavior and act out shame for anti-social, bad for learning behavior.
Looking for positive, community-oriented ways to encourage pro-social student behavior. I have a few thoughts (below) but want to hear your ideas!