Diffusion of responsibility is insulation from feeling shame because no one person is singled out.
When I started at Google, there was an executive who would do stochastic shaming.
He wanted everyone to do OKRs every quarter.
On the due date, he'd randomly sample PMs and look for people who hadn't done their OKRs, and then send email blasts to all PMs shaming those handful of people.
The fear of stochastic deep shame was way more effective at encouraging action than the same amount of shame diffused across a population.
"35% of you haven't done your OKRS yet" wouldn't inspire action.
But the danger of "Jeff Smith is a bad PM because he hasn't done his OKRs yet" absolutely would.