You can right click disable your website which would slow them down a bit. In essence they wouldn't be able to view your code. Do a google for "right click disable" and you should be able to find the proper code insert to your html.
Unfortunately, if they are determined, they will find a way to view your code.
Then again they could get lucky like I did, run a search on Yahoo vs. my standard Google searches, and come across EasyPano's website.
Ain't nothing friendlier in the world than a muddy wet dog.