There's no point saying that, as it's the decision of the people reading the documents what they use - not the author. Many people use rendering applications that don't support the complete range of features, from Preview and Firefox to mobile apps. Authors have to adapt to the audience, not the other way round.
Willi Adelberger wrote:
Never use Apple Preview to read PDFs as it is not a good PDF viewer. Avoid it as it cannot show PDFs correctly.