I recall there was a story from Predictably Irrational where the experimenters were trying to figure out how to get participants to avoid double-dipping tortilla chips.
Along with a control condition, they tried setting up a sign that said “NO DOUBLE DIPPING”, and I think they also tried paying people or getting them to promise not to double dip, stuff like that.
The thing they found most successful was to set up two bowls of dip: One labeled “For double-dipping”, and one “Not for double-dipping”.
They supposed that once they had to do a physical action where they sorted themselves according to “what kind of person they are”, they wanted all of their visible actions to be consistent with that.
On the one hand, it’s depressing because people seem to care more about fitting in than being rational.
But on the other hand, it’s reassuring that we’re so eager to solve things collaboratively that we’re willing to set aside our own personal opinions.
Our relentless obsession with social connection will either be the thing that kills us or the thing that saves us. And I honestly have NO idea which.