Things not to suggest:
Changing forum titles. (See the explanation of Google below)
New member groups, or titles.
New staff members, or suggesting existing staff members be removed.
Removing members from the database. (See the explanation of Google below)
Removing posts from the database. (See the explanation of Google below)
New forums for unknown MMO titles, or non MMO games.
Forums for topics not relating to exploits, hacks, bots, or guides, related to GAMING ONLY.
Changing rep requirements, or post requirements for certain sections, without a very good, and valid reason.
New chat features (Java based, more AJAX based, etc chat systems)
Useless plug-ins or 'products' (as vB puts them) that are mainly based for smaller forums.
More as I think of them, or see them.