Is there a way to display a blank GUI Home Page on a 450SM?

Its more for security purposes, but I was wanting to know if there is a way to have the SM's show a blank home page until someone has enetered a correct username and password? There is a lot of information on the home page and I have some competitors trying to get service from me as well as some nosy customers who figured out how to bridge their router and us an ip scan to get into the SM. 

I guess security banner feature you need to enable.
Have a look here