These rules might not always apply well to discourse between adults. On the other hand, if you are an adult who is speaking to - and leading - children, Mr. Rogers still provides a positive example of how to approach the subject. Distilling challenging subjects into simple, factual, statements without negative emotional attachments can be extremely difficult. When it works well, you provide an invaluable level of education. If it doesn't, at least you've done your best - and in general children will respond positively to the attempt.
The abstraction works well for everyone: communicate thoughtfully with deep intention and understanding. Do all you can to know the perspective and interpretations that your audience will have and work diligently to express things both clearly and compassionately.
For example, think about how much good could be achieved if the knowledge of people that the advertising industry holds were used exclusively to present only messages truly in the listeners' best interest and with real compassion.
To reword my abstraction: be mindful and compassionate in everything you communicate and always seek the best expert sources in improving your communication skills.
