Recently, we've had some suggested edit spam from anonymous users. The specific question being targeted is protected:
protected by studiohack ♦ Apr 27 '11 at 1:10
This question is protected to prevent "thanks!", "me too!", or spam answers by new users. To answer it, you must have earned at least 10 reputation on this site.
Great, so 10 reputation is required to answer the question. This doesn't stop anonymous and new users from spamming edit suggestions. Could the same restriction be applied to suggested edits to the protected question and its answers?
As this would only apply to protected questions, which evidently attract not-so-good attention, it would not hinder new and anonymous users' ability to edit for the most part.