This used to be quite common in Japan. In Japan, if you were left handed, they would make you do everything with your right hand anyway. They would "fix" you. This happened to me. I'm pretty sure I'm a Lefty. I throw, kick and do most physical things with my left hand, but I write, cut and do other "formal" things with my right hand. I think this may be part of the reason that I have messy handwriting. As for as I can tell, while my brain may be "damaged" by this, I can, for the most part, function normally.
As part of my exploration into the "Right Brain", I've become more curious about what the effect of forcing lefties to be righties is. I've heard a number of "stories" about what this does to you, but I haven't read anything rigorous or academic. The problem is, I don't even know what to search for. It's a hard Google query to form.
Also, is there any easy way to tell if your right brain/left brain functions are reversed?