Top button fastened or not?

As seems to be the latest fashion, when wearing a normal shirt, or a polo shirt, the top button is fastened, no tie is being worn and to me it just sees scruffy, untidy and unfinished. It looks even worse when a normal shirt is worn with a dress jacket.

To me, if I have my top button fastened I'm wearing a shirt and tie, top button on a polo shirt never gets fastened.