So, is there an alternative license that likewise ensures those who would modify your software are required to release the source code freely and publicly under the same license, without being deceptively worded or beholden to suspicious organizations like the FSF? Creative Commons, perhaps?

I get the impression that anti-GPL anonymous' objections are to the methodology of the GPL and its proponents, not the philosophy of the license itself. So a similar copyleft license with more clarity and less political agenda would seem to solve the problem.