You most certainly can, and should hide all of the ms-access interface. The
options to complete hide and keep people out of the ms-access interface can
easily be done using the tools->start-up options. Using those options allows
you to complete hide the ms-access interface (tool bars, database window
etc). Also, using these options means you
do not have to bother setting up security.

Try downloading and running the 3rd example at my following web site that
shows a hidden ms-access interface, and NO CODE is required to do
this....but just some settings in the start-up.

Check out:

http://www.members.shaw.ca/AlbertKallal/msaccess/DownLoad.htm

After you try the application, you can exit, and then re-load the
application, but hold down the shift key to by-pass the start-up options. If
want, you can even disable the shift key by pass. I have a sample mdb file
that will let you "set" the shift key bypass on any application you want.
You can get this at:
http://www.members.shaw.ca/AlbertKallal/msaccess/msaccess.html

You should also distribute  a mde to your users, as that disables design
view, and code can not be changed. I you use a mde, then you have to split
your database.....