That billboard is courtesy of TheGoodLordAbove, a.k.a. “God” on Facebook, who has millions of followers. They raised just over $7,000 just over a week ago and got the sign up fairly quickly. It will be up for the next month. (God told me last night that the leftover cash would help pay for taxes associated with the fundraiser.)
Will Bachmann listen to that billboard? Probably not.
Is it any less credible than the voices in her head? Nope.