Maybe the woman who was walking slowly and reading was deaf ... Or physically incapable of walking faster for a reason that is not readily apparent? Anyway, I have only encountered the "people chatting blocking" syndrome around here, not the others, and when I ask to be let by with a smile, no one has ever complained or been in a huff.

Come shop here!

We have "self-serve check-out" lines, so people in a hurry can go to those, I have not seen or had anyone break into a line.