Just so that we're clear, Brad just posted a direct quote from John Piper. It was even used on the back of the book "God's Lesser Glory," a hack job written by Bruce Ware back in 2000. All that Ware proves throughout his 230 pages of "exegesis," is that he neither fully understands the positions of today's foremost Openness thinkers, nor is he willing to interact with their arguments directly.
I find that in most books refuting Openness, the tendency is to continue to bring up the same tired arguments despite the fact that Openness authors have addressed them. Someone who only reads a book against Open Theism, however, will not realize that the issue has already been resolved by Openness proponents and thus the misperceptions continue.
It's quite frustrating for me, and I can't imagine how irksome it must be for Boyd, Sanders, Pinnock, Hasker, etc.