Whatever the misleading facial expression is, it can cause a few problems: It can give people the wrong idea about you, and perhaps cause them to avoid you. It can lead a lot of annoying, intrusive comments, especially for women, such as, "Smile! It's not so bad! You look so unhappy. If someone is constantly being told about the false message their face gives off they may also become quite self-conscious about it.
Messenger To encourage giving, many charities that serve people in need use photos depicting either happy people or sad ones in their pitches. These pictures symbolize the people who will benefit from donations made in response to those appeals. Smiling faces also remind people of the potential benefits of their donations. That can spur giving by increasing a sense of accomplishment for donors. Seeing sad faces, on the other hand, can boost donations by highlighting the severity of a problem and the acuteness of a need.
That article is biased right. It is not the environmentalists and I don't understand why it is so important for the right to blame them. I am an environmentalist and I strongly advocate prescribed burns and always have. I was a member of the Sierra Club for years.