Why Analysts need to be quiet

Beefjack.com writes; "We all know about analysts; if you spend time cruising video game websites it is impossible to avoid them. Whenever there is big gaming news or rumours, they are there. Whenever there is a whisper or a leak, they are there. Analysts are always at the scene, and we lap up their words. But why? Why should we listen and believe what they tell us?"