I was just saying that I have yet to witness mobs of yelling children running riot in pubs at a level that deserves the amount of distaste displayed in this forum. That said, having a child, who is not yours, try and sit on your lap while you are eating is unacceptable, and shocking that the parents did nothing.
However, I have also had people move tables in a noisy huff because I dared to bring a sleeping, and slient baby, into a pub on a Sunday afternoon. These tend to be the same people who take on a look of horror when you take a child on a bus, train, pavement, supermarket basically any place in public when they might be within ten feet of a (no, don't say it!!!!) a child!
When you have kids you slowly come to the realisation that there are people in this world that just hate children. And there is nothing you can do about. (except, of course letting them run riot in pubs to spoil their afternoons...sorry, that was a joke)