There was a fascinating article in last weeks Mishpacha (Hebrew) about the Mehadrin buses. One of the members of the organization in charge said that the מחמירים are ruining things. People have to know what is a chumra and realize that they can't impose their chumras on others. He said that family seating (in the middle of the bus) is accepted by many and is at best a מדת חסידות (to avoid it), and therefore those who are pushing to deny family seating on mehadrin buses are killing support for the whole mehadrin bus effort.
I was very pleasantly surprised to see this published in the Mishpacha.
I will try to scan the article in and post a link to it.
Here is the scanned in article.