Board Thread:Support Requests - Getting Technical/@comment-1949364-20140609120514/@comment-452-20140609130833

Technically, yes, you could do it, but Wikia Staff would probably hit you with "You further agree: Not to intentionally [...] obstruct the proper functioning and view of [...] user interface and functionality by other users, including but not limited to changing or adding javascript or CSS changes to the Service that would prevent the proper display or function of [...] user interface and functionality;"

I also think that collapsing the TOC by default is double-plus-un-good, but since Wikia Staff have deliberately made it different for anons, they probably won't allow it to be changed.