I noted that the Banana was a teenager, which I hope means 18 or 19.
I also noted that the charges are public nusance and breaking city ordiance with marketing hype, so more that the Banana was not allowed in the first place, much less an armed Banana.
So, Banana would have been told to go away, even without being armed.
I still don't understand why a Banana... But ok, whatever you want.