You don’t need to go out of your way to preserve order even in crowded places, as long as you have the adequate crowd control solutions at your disposal. The truth is that people want to be guided, and the fact that we love living in societies proves without a doubt that individualism can come second when our interest is at stake. The problem is that when individuals are assimilated by a mass or people, they tend to forsake reason and rely solely on instinct and are influenced by others.
Wisely displayed stanchions can act as silent reminders that some boundaries shouldn’t be crossed, therefore, order is preserved. The ones setting them in place need to be aware of how large the crowds might get and which will be their reaction in case of special events. A velvet rope is perfect for a bank or any financial institution, but it would be rendered virtually useless by a large crowd waiting for a rock star to appear.
Doubling up these solutions with professional security teams will guarantee desired results, but the latter are serving the same role as the barricades. They are not aimed at actually fending off an assault, but rather to have a deterring effect on those who would be tempted to go a step too far.