When I review a double-blind paper, I consider it part of my duty as a reviewer to avoid figuring out who wrote the paper. Sometimes I will accidentally figure

When I review a double-blind paper, I consider it part of my duty as a reviewer to avoid figuring out who wrote the paper. Sometimes I will accidentally figure it out when I look at related papers, in order to better understand the contribution. But even when I realize "Oh, right, it's probably the same group," there's still some unknowns in who, exactly, the authors are, and their order. (In my area, mostly computer science systems, author order roughly maps to amount of contribution.) I'm usually a sub-reviewer, not usually on the program committee. And some of the conferences I review for are general enough that I may get papers in my general area, but not my current focus. So it may not make as much of a difference for the program committee of a tightly focused conference, but it may for all other cases.