Yes I did it before when I was a newbie. I just want to try my luck, so i'm just guessing who would win. I blindly placed my bet and I condition myself that i'm ready to lose it. But you know, it's not a good idea even you're prepared for the worse. Because why placing bet if you don't have idea on the sports that you're going to bet in? If you can gain knowledge to maximize your chance to win? It's true that luck is a major factor in gambling however in sports you can somehow use your knowledge to choose the right team.