Thanks a lot. I will give it a try since if comments are removed along with minification then the vast majority of users will be deterred from searching deeper through classes in the minified stylesheets. The big chunck of CSS outputed in the HTML is coming from my themes ACE Custom CSS editor and this can also be minified with ease.
What is left then to hide is the Theme name which means renaming the folder after disabling and re-enabling.
Thanks a lot for the advice.