My kids are all pretty big and tough and strong, and I don't worry about them being bullied - the reverse, be kind to people and don't ever be a bully yourself, and I think they've followed that.
I think airports are places of huge human drama. The more I see of it, the more I am convinced that Heathrow is a secret city, with its own history, folklore and mythology. But what has surprised me is the love the people who work there feel for the place. Everyone seems to think they are plugged into something majestic.