Simply put, nobody owns anything on the wiki. This means just because you created a page doesn't mean you can decide what goes on it, unless it's spam or not canon. The goal of the wiki should be to work together to create a detailed source of information about Little House on the Prairie.
This does not mean however that a page such as the main page can be changed at will. Any additions that are relevant to the sections already on the main page are welcome, but if you want something big to be changed please post a message on the talk page. Then, others can put in their input and a consensus can be reached.
Additionally, your userpage belongs to you but stuff can be removed if it's offensive.