Read the complete step-by-step guide on how to avoid these -- and more prosaic sticky social -- situations, at Gizmodo.
You are at the bar when you are supposed to be at your girlfriend's crappy art show. Your chat with your friend Jane, who checks into the bar and tags you: "At this awesome bar, just talked to [Your name here] about his Star Wars memorabilia collection!" Your girlfriend sees this on Jane's wall, walks over to the bar and dumps you on the spot.
You are having an affair with your wife's sister. Your wife's sister checks into her home and says "Having awesome sex with [Your name here]". Your wife sees this on her sister's wall and divorces you. (Also, a robber you're friends with steals your Star Wars memorabilia collection because he knows you're out having the affair.)
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