I have two examples on my mind
When someone takes it upon themselves to decide who does or does not have access or rights to a community or identity.
It relates to me when people start to judge newcomers in the programming, like "Are you dumb, you don't know what monadic tensor is? Duh...".
Technical disputes over minor, marginal issues conducted while more serious ones are being overlooked. The implied image is of people arguing over what color to paint the bicycle shed while the house is not finished.