Haha! Well on the surface it seems like breaking your wrist would be the perfect solution to the problem! But before you do you should take into consideration the negative too. Because it will effect a lot more things in your life then just getting out of class or sports and possibly make things way more difficult for you than if you had just gone to class. Als keep in mind it is EXTREMELY hard to inflict that kind of injury on yourself, even if you want too. Finding someone else to do it would be difficult as well. I do not think your crazy, just weigh out the pros and cons and the im sure you will find that breaking your wrist is probably not the right desicion. Good luck.

ps if you break it the wrong way it may never heal right and cause damage that is permanent.