“Without calling anyone out specifically, I’m going to note that if you’re discussing a contentious thread, and shooting the breeze … take a look at the faces in the user icons in that discussion,” she wrote. “Binders is pretty diverse, but if you’re not seeing many WOC/non-binary POC in your discussion, it’s quite possible that there are problematic assumptions being stated without being challenged.” (“POC” stands for “people of color.” “WOC” means “women of color.” “Non-binary” describes people who are either transgender or identify as a gender other than traditionally male or female.)