That is a pretty silly "parking" page. The problem with such silly things is that not everyone has the same sense of humor, or sense of cuteness. Maybe dreamhost should actually have a choice of parking pages.
I'm not actually sure why people "park" a domain. I believe there was some significance historically, but today's domain registration system doesn't require parking to continue reserving an unused domain.
When I have a domain that's active for which I don't have any http:// content, I tend to just put an empty index.html file at the document root. That's a good method to use for development also because index.html has a higher priority than index.php. Want to work on the site and take it for a test drive, then delete the index.html... when you want it to go back to a blank page just touch index.html and poof the dev site is hidden again.