Formatting Limited to a Style Selector in Editor?

[hairydog]

yup perfectly valid html5
I don't see what the issue is here.

The issue is that I do not want users to put inline styling codes into the html. Valid or not, as far as I am concerned they are not a good idea.
The main point of installing a CMS is to let non-technical users amend the content of pages.
I want to be able to restrict the havoc they can do to the design of the pages.