Typing in all caps makes text more difficult to read. Fonts are designed to lead the eye through the word quickly and easily, and capital letters are made for the specific purpose of identifying proper names and breaks in ideas.
Abraham: "I was suffering from the capslock-syndrome for years until i finally found this amazing page, thank you guys - you guys are lifesavers!"
Jessica: "FINALLY A GOOD WEBPAGE ON THE INTERWEB - THANK YOU!!!111"