Restaurant table manners for using salt and pepper shakers

Q: Enjoyed your column on the proper use of salt and pepper shakers. Dining friends and I have often had similar discussions. While on the subject, there have been two more discussions. The first question: if someone asks to please pass the salt, should you pass both the salt and pepper? A few of us were taught that the shakers should be passed/kept together. The second discussion has created a few friendly yet heated conversations. If someone asks for the salt/pepper, is it considered rude to pick them up and use them yourself first, and then pass them on to the guest who requested them?.
Here is proper etiquette, table manners and social skills to be polite and avoid being rude when asking people to pass salt and pepper shakers across the table. It is rude to reach across people and the table for the salt and pepper shakers.

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