Almost half of women who responded to a U.K. survey said they've uploaded an unflattering image of another woman to a social media site, knowing full well the woman pictured would hate it.The survey found that 24% of respondents had purposefully uploaded and tagged an unflattering picture of a female friend in a bikini, despite knowing that friend would be unhappy with it. Just under half of those surveyed, 45%, had done the same with a photo of a friend in an unflattering outfit, and 41% posted pictures of their girlfriends with no makeup on.What's even harsher, though, is the...