What exactly is the benefit of publishing a list of router mac numbers of private residences? The only benefit that I can see is to serve as a cover for having been caught in the act of collecting them in the first place.
Whatever benefit you can think of it seems that the potential for misuse and resulting damage is far greater. This is not the behavior of a publicly responsible corporation.
It can rightfully be argued that any techno-crook could cruise around and collect similar information. However, a very large capital investment is required to collect that information on a global scale. Individual criminals or even organized criminals could not easily garner large lists of such data on homes in distant countries. Google has made it easy for these types. They should admit this whole path is a mistake and do what they can to remedy the situation.