Au contraire.
I saw this the other day and thought to myself “how pointful, informing the plebs and oiks who aren’t purchasing franchised comestibles that all and sundry may sit here without fear of ejection, thereby depriving your humble correspondent of a comfy spot to sit and write postcards”.  
Although a forest of similar seats has suddenly appeared beneath the departures board, albeit already inhabited by the homeless (despite the absence of a pointless sign).