The main obstacle is whatever warning the web browser presents on switching to full screen mode. These warnings are browser specific. Also we need to know the user's operating system since some of our counterfeiting will involve mimicing operating system components.
Since this is for demonstration purposes I have not coded counterfeits for all browsers and/or operating systems. Please select a browser from the list and select 'proceed'. If you are using a browser other than Firefox then the fake warning windows will be incorrect i.e. currently they are hard coded for Firefox. I tested the 'switch to fullscreen' function on Firefox and Chrome on 14-September-2015 and it works. It did not work on IE, on this date.