Eurocontrol has always been a bunch of technocrats who apply the most complicated solution to everything.
You start at their access control system, where each person stands in a tube, and at the base of the tube is a mat which has sensor pads in it which are connected to a computer which works out how many feet are standing on the mat - to prevent more than one person squeezing in. Fairly obviously, one could defeat it by each of two people standing on one leg each.
It's no wonder they have implemented a horrendous routing system which ATC do not operate on the day anyway.