Please take a few minutes to read our New User Introduction and The Troper's Code. If you're interested in knowing what rules the moderators have to live by here, please also read the Policy for Wiki Staff.
One thing that we suggest when editing is leaving a reason in the "Summary" box at the bottom of the edit page - especially if you're going to remove a trope from a page. That way, we know you had a reason to make the changes that you did... and there are actually people interested in the reasons why pages are edited the way that they are.
If you need any help, feel free to ask anybody on the moderation staff for assistance.