What if it's at an airport queue, where they are testing how to improve queue times and whether having the queue be in a straight line or in zig-zag makes it faster for passing security checks?
Should the passengers sign an agreement before being "experimented on", and having them be split in two groups, where one stays in a straight line and one in zig-zag?
Should the passengers sign an agreement before being "experimented on", and having them be split in two groups, where one stays in a straight line and one in zig-zag?