Q: Can I tweet someone else's wedding if I am a guest? How about posting pictures I take during the wedding on my Facebook page?

A: You can tweet live updates of a friend's wedding, but the real question is: Should you? While it would be exciting to share the events of the day in real time, you'd be taking your focus away from the wedding. Talk to the couple ahead of time. How do they feel about tweets on their wedding day? It may make sense if there's a special group of close friends or family who cant be there on the day of the wedding. Otherwise, who are you tweeting to? The people who didn't get invited? If you do receive permission to tweet, keep the comments upbeat and cheerful—this is not your opportunity to snark about the bridesmaid's dresses or entrée selection.

While it's okay to post one or two pictures from your phone during the reception, keep cell phones and smart phones off and in your handbag during the entire ceremony. These should be off and away regardless of any thoughts of Facebook or Twitter; using these during the ceremony is rude, and will look like you are bored and uninterested—hardly the image you want to send on someone's wedding day! Facebook photos after the event are inevitable, and the results are usually hit or miss. If you're the one posting and tagging them, edit kindly—don't just post the whole lot. Candids gone wrong deserve a quick click of the delete button. —Anna Post, The Emily Post Institute

See all questions about wedding ceremonies and traditions

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