I'm not sure why my comment got down voted so much, my point is if a obscure web address is the only line of security it is terrible, especially as they recommend you to bookmark the address in your tool bar. The point is it might look great and secure at first, all it takes is a small mistake from one of many angles and it's done for. Examples of mistakes, people posting their urls, people being tricked into posting their urls, shared computers with bookmarks, the webmaster accidently installing a sitemap script which indexes them all etc.