Default File system Authorization

Dear all

I have a question regarding the file systems Authorization

By default File system are created with authorization as follow :

                 - Everyone RX (this folder only)

                 - Users (3 sets of permissions)

                 - CREATOR OWNER F - subfolder and files only

                 - SYSTEM F (all files and folders)

                 - Adminsitrators F (all files and folders)

In fact what I do not like about this is that in the "user group" of the machine is populated "Authenticated Users"

So my collegues non IT, create share on these machines leaving the inheritance and then the whole company have access to thoses files.

Iwas wondering what would be the impact of removing the entries for users, creator owner, everyone and system

would that lead for issues for application to run?

Why keeping such wide permission on sever by default instead of closing the permission and granting access to people that need it ?

Thanks for your help

Bruno