Yes It is my strongly held opinion that open peer-review is essential to help steer humanity away from disasters.
Many of the large scale disasters that could happen can be understood using science but the closed system of peer-review we currently use is failing to give the right answers. It is not just the review of scientific papers but also the reviews of funding and the ensuing public debate that matter here.
For example nuclear fusion is a possible new energy source that could replace our reliance on fossil fuels. The Joint European Torus is very close to providing a net gain in power and ITER is expected to succeed, yet funding for the project is very limited and there is very little public debate about it. The main problem it has is the word "nuclear" which triggers a whole cascade of biases, yet it is very different from existing nuclear power.
Peer review of climate change is also a mess with scandals over the hiding of data and methods used. The waste of money on tamiflu is another example of how easily faulty peer-review can cause problems.
As technology progresses the potential for this kind of problem is only going to increase. We desperately need good quality open peer-review so that the right policy decisions can be made based on academic research rather than the biases of public opinion.