When you look at the list of who is online, it shows you what page of the website a member (or a guest) is currently looking at.
Occasionally when I click on Who's Online, I get a list of who is looking at what page, and all the guests (about 70 or so, at the moment) are looking at "Nothing, or nothing you can see" which is what it says when someone is looking at a clan board.
Isn't it weird to have dozens and dozens of people who aren't logged in looking at clan boards? And if they aren't -actually- looking at clan boards, isn't it unusual that the website thinks they are?