With Geocities you could see millions of high school art students demonstrating for the entire world that they don't know the first thing about design or color.

Tumblr is the epitome of a walled garden. The flowers look pretty, but you still have to plant them in neat, orderly rows. Even Facebook's Pieces of Flair offered more of a creative outlet.

You can still make oversized blinking purple Comic Sans text on a black background above an animated "Under Construction" GIF. But you have to do it in CSS.