Here's an interesting article on teenagers' romantic breakups and poses some interesting questions. For example, is it o.k. to breakup via a posting on your former-partner's wall? Is this preferable to breaking up face-to-face? Is it o.k. to breakup by simply changing your status to "single"? If you do break up, what is the proper etiquette for dealing with your former partner's friends, siblings, or parents? Do you de-friend them? Do you de-friend your partner or simply not communicate? Even without reading the article, a fair number of people have already dealt with this issue and probably have strong feelings about what is and what is not proper, appropriate, adult, considerate, etc.
It's an interesting world and getting interestinger every day!