I don't think it's a matter of free will being predictable, it's more a matter of us being slaves to our biological instincts and mental conditioning. We may think we as individuals or a species operate under free will, but we're still acting out Nature's plans borne of hundreds of millions of years worth of evolutionary hardwiring, and nothing is going to change that.
I take the romantic, James Tiptree Jr.-ish view that the most admirable thing a person can do is try and rise above their instincts, however doomed a struggle it is. It's the only way to taste any sort of real freedom or clarity of vision.
*puts away bong*