This method actually might be feasible without leaving every passenger bewildered if they combined it with Southwest's system of queuing people in numbered orde

This method actually might be feasible without leaving every passenger bewildered if they combined it with Southwest's system of queuing people in numbered order before they board. Each passenger is assigned a specific boarding order instead of a boarding group, so no "group 123" problems. I think Southwest as proven that people can figure out how to stand in order "A group, 1-30 on this side, 31-60 on this side," and then B and C groups. It'd just be a matter of assigning A1 to the person in the back row window seat on the left, A2 to the person two rows in front of that on the left, etc., as demonstrated in the video. Families with young kids could queue up together, because they're (probably) going to be sitting together in one row anyway, and they would have a row's buffer on either side of them while the parents are trying to help the kids get situated.