Pauluk2w,
you totally missed the main point: if the earth, as a result, started to spin too fast, how would we keep our balance ??? No way!! We would obviously fall right off the edge of the world into space, thus stopping the actions that caused the initial fatal acceleration !!!
So the earth rotation would eventually slow down. So now the real question is: just how long would that take???....[X(][X(][X(]