UninvitedCompany said here:

CSD use is expanding rapidly, mainly because it's so much easier than WP:AFD and so much quicker than WP:PROD. This is a good thing, but CSD does need checks and balances in some form. The question is, what form should the checks and balances take? There is precedent.

WP:PROD says:

Users citing this essay believe that as a general rule, there should be some separation between the tagger and the deleter. In other words, for most deletions, there should normally be at least two pairs of eyes on the article.

However, an exception should certainly be made for content that is, or could be, harmful to Wikipedia or to a living person. So in terms of the CSD criteria, users citing this essay hold that those coloured red in the following chart could often be deletable with only a single pair of eyes, those in yellow sometimes, and the others only under exceptional circumstances.