Hi Stacy,
that won't really work because it will always be easy to figure out
the URL of your site. You just need to install a network traffic
monitor on your computer and then check to which site Prism connects.
About the "select all": that's an HTML/Javascript issue. This is what
I found with a quick google search:
http://javascript.internet.com/page-details/disable-text-selection.html
Cheers Johnny.