He may be referring to redirecting your browser based on referers.
Look, it's uber simple to circumnavigate any anti-view source method. Because the fact is, if the browser doesn't receive the source then it can't do a damnable thing. If your browser gets the source, so can you the user, because you just downloaded it! Now, there is a very effective way of doing this.
(If you're on windows, click Start -> Run and type in 'cmd' if you're on Windows XP or 'command' for earlier windows. Basically we want to get the command prompt). Now say we want the source for say, page.html on example.com (example.com/page.html). We type:
telnet example.com 80
and then our HTTP request
GET /page.html HTTP/1.0
Hit enter twice. The server sends you the page's contents, and it's plaintext.
If frames are being used its always simple enough to find the real page.