Based on the provided passage, the stylistic devices used are as follows:
a. Paradox: The statement "There is nothing wrong with playing peek-a-boo" contains a paradoxical element by juxtaposing a child's game with potential issues in communication media.
b. Polysyndeton: There is no explicit use of excessive conjunctions in the passage.
c. Asyndeton: There is no explicit use of the deliberate omission of conjunctions in the passage.
d. Metaphor: The passage does not contain direct metaphorical comparisons.
e. Anaphora: The passage does not contain repetitive use of the same word or phrase at the beginning of successive clauses or sentences.
Therefore, the correct answer is d. metaphor, as there are no explicit metaphorical comparisons in the passage.