Adjusting for consumer height?

Berlin-based artist Hans Hemmert (famous for his work with balloons) threw a party where guests wore shoe-extenders to make them all the same height of 2 meters. Aside from bringing the partygoers all to a common eye level (and eliminating the awkward postures of party talk between the tall and the short), this could be a way of optimising shopper traffic-flow and settle the question of different charge-out rates for shelves, to comply with the new GSCOP?
Source Andrew Sullivan, The Atlantic

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