If this cheap confectionery poster had any subtlety or cleverness his posts could be damaging.

All the above can possibly mean is the advertising of something like a cheap chocolate bar on a poster.

Readers that are able to cognitively process a complete sentence will recognize the referential possessive personal pronoun which requires that the subject of the sentence be male.

One self-protective symptom of dementia and other mental deficits is the inability to recognize the existence of and capabilities of the intellectual processes of healthy individuals.

Fortunately for readers of your posts, the reverse is not true.