That was the kind of person that the post was mocking, you have to take into account who the person who says the joke is, not what your personal experience with others are.
And you have to take into account if the post is a response or a play on something in the context of the thread or conversation that is seen as shared knowledge.If similarity to real people are the criteria to determine if someone is serious most humor that parodies or mocks will be understood to be serious claims and not the intended joke.
