The flag since ancient times is a symbol of the state or separate groups of people (parties, groups and so on). In particular, it makes them recognizable and creates an individuality. I can not agree with your thoughts about the fact that as a result we see a division of people. Partiotism has negative consequences and is used for selfish purposes.
I really like that your city pays attention to creative ideas. I like the fact that this business is common, and everyone can see it. These flags look interesting and fun. That is, they can be assumed that they satirically show us the established picture of the world in which everything is flown.
Are you familiar with the work and work of Jacques Fresco? He dreamed of creating such a free world. He had a project "Venus". His idea sounded very inescapable, but alas in our time the creation of a free from the borders of the world is a utopia.
Thank you!