Of course, station barriers have other roles.
Now, everybody knows that children on train are a nightmare to your standard, grumpy, entitled commuter. Right?
No, only the ones that try to compensate for a lack of size with voice volume, or act like they are desperate to burn off excess energy and the parents do three fifths of bugger all to attempt to pacify them. It is similar when eating out in a resteraunt, other peoples disruptive children are a nuisance to those who have quite possibly paid a decent price for a pleasant evening out with good food. I can accept that sometimes children will play up/get tired/irritable, but when they do play up, the parents should at least make some effort to calm them down or distract them (I've seen both extremes).