it's important to have priorities

Seen today on the Paris metro, posted atop the courtesy seats (italics mine):

"These places are reserved, in order of priority, for:

• disabled war veterans
  
• the industrially disabled, the blind, people with disabilities
  
• pregnant women and people accompanying children under 4
  
• people aged 75 and over"

It suggests some fascinating disputes. Just being old doesn't get you far, especially if someone comes along with a cranky 3-year-old. A blind pregnant woman could easily be displaced by someone who has lost a limb in a horrible factory accident, but only if there's no pesky veterans nearby...