I know u clearly mentioned about not extending it to front end users. So i'll not ask u to do it. But is it possible to add support for front user.?

It is, but requires a lot of work. You will have to use polymorphic relations or add additional column for front end user. You will have to build whole front end interface etc.

There is an alternative paid plugin for front end users: http://octobercms.com/plugin/responsiv-support