Yeah, but that's extra work. I feel the poster should provide the passwords, etc. if they are going to excerpt from a site requiring registration.
One of the interesting things about the browser Firefox (instead of Internet Explorer) is that it has an "extension" that makes it a lot easier.
The BugMeNot "extension" provides the following function. Just right click anywhere on the excerpt, and it opens a window with the username and password from BugMeNot. This is really really cool.