For anyone who is interested in blocking their site off – a concern is that an iframe can be used to include pages on your website into external sites. So to prevent people hotlinking your site’s webpages through iFrames simply include this script at the top of your pages.
Also see related posts:
JQUERY CHECK IF WINDOW IS IN IFRAME
JQUERY RELOAD AN IFRAME
GETTING THE SRC OF AN INJECTED IFRAME WITH JQUERY