Contributors frequently propose new criteria for speedy deletion. Please bear in mind that CSD criteria require careful wording, and in particular, need to be
Objective: most reasonable people should be able to agree whether a page meets the criterion. Often this requires making the criterion very specific.
Uncontestable: it must be the case that almost all pages that could be deleted using the rule, should be deleted, according to consensus. CSD criteria should cover only situations where there is a strong precedent for deletion. Remember that a rule may be used in a way you don't expect, unless you word it carefully.
Frequent: speedy deletion is intended primarily as a means of reducing load on other deletion methods such as Wikipedia:Articles for deletion and Wikipedia:Proposed deletion. These processes are more discriminating because they treat articles case-by-case, and involve many points of view; CSD sacrifices these advantages in favor of speed and efficiency. If a situation arises only rarely, it's probably easier, simpler, and fairer to delete it with one of the other methods instead. This also keeps CSD as simple and easy to remember as possible, and avoids instruction creep.
Nonredundant: if the deletion can be accomplished using a reasonable interpretation of an existing rule, just use that. If this application of that rule is contested, consider discussing and/or clarifying it. New rules should be proposed only to cover situations that cannot be speedily deleted otherwise.
If you do have a proposal that you believe passes these guidelines, please feel free to propose it on this discussion page. Be prepared to offer evidence of these points and to refine your criterion if necessary. Consider explaining how it meets these criteria when you propose it. Do not, on the other hand, add it unilaterally to the CSD page.