Helpful:
Insulting someone is UN’Helpful’ to your cause.
Lets try again:
HLM: You mentioned the street belongs to everyone. Even though that is true (if they made a bracha on it :), they are still not allowed to do things that are Assur on that street. For example, you would never say one can eat pig on the street just because they can walk on it. So too, assuming “hanging out” on the street is not Tzanua (as “hanging out” is not “Kol Kavod Bas Melech”, and is not acting in the general quiet manner that a Bas Yisroel should act, as I have pointed out before in the thread), the fact that they can walk on the street does not excuse their behavior.
I know, my paragraph is longer, and less emotional. But I believe it will be more effective.