the one thing that semi protected pages will block is new users (non auto confirmed) from editing pages.
So semi protected is only used in places where we want to stop new users from editing or prevent spamming (most spam is posted from accounts created a few minutes ago).
EDIT: well currently the auto confirmed requirements is set to 0 so all users are auto confirmed. Might have to talk to some one about that.


and speaking of smilies!