I think that a wiki owner can add all sorts of things to a page, including custom scripts and all sorts of fancy layout stuff.
However, I am not sure if that applies to admins or bureaucrats. It might just be owners. At any rate, we cannot know till we get someone to be admin.
I don't know if regular users can use CSS or JS. I know I was able to do some crude stuff with layouts involving the style property, but that is very crude and inefficient. If I could figure out how to have scripts, I could even have it tell you how many users were viewing a page or something.
I was trying to figure out how to make spoiler tags like they have on forums. (The kind that need a button to be clicked to view stuff or that are black highlight till you mouse over them and then it will show the content. However, I think most likely I'd need scripts to do those.
Am trying to figure out what else I can do as a regualr user. I tried texts with a Tree Star background, but apparently the background-image property isin't working properly with the div tag. Doesn't work.
I'm gonna try and see if this spoiler thing will work:
He fought an angry Sharptooth.
The Sharptooth tried to eat him.
However, Littlefoot conked him in the head with many Tree Sweets.
The Sharptooth didn't like the smell and so left.