There is no such thing as an unacceptable play style.
There are only play styles that do not fit with certain groups and are unacceptable in that particular group. If that is the case then it is time for the player to move on to a new group that does accept their play style.
I completely disagree with you.
Min-maxers make the game all about themselves. They force the rest of the group they are in to conform of their play style. Whether the rest of the group wants to or not. They force the GM to change the balance of the game to account for their min-maxing. The min-maxers are the ones taking the choices away from the rest of the group, and claiming their play style is superior. And will usually brook no other point of view to exist. They bully the rest of their group to get their way.
I've been in so many campaigns in my life where the min-maxers and powergamers hijacked the campaign and completely derailed it. Not because the GM lacked ideas or stories. But because the min-maxers made themselves so much of a problem, that the other aspects of the game got completely bulldozed in the process.
So for me, I drew a line in the sand. I won't tolerate their bullshit anymore.