Having a Wikia runs the risk of occasional vandalism. This refers to any edits made to detract from the Wiki's goals, or mislead the community. If you mean well trying to help the community but made a mistake, have no fear. You are no vandal!
If you see something out of place, help us clean it up. At the top of the page is a history tab. Click it to access the history of the page. Locate the edit that seems to be the cause of the problem, and "compare selected versions." There should be an undo option. Click it, follow the instructions, and it will show a preview of the edit.
Admins have extra features that help combat vandalism. If someone does something bad, they will be temporarily banned from editing. If they continue to do so, they may be banned permanently from the Wiki.