It is interesting to note that according to freebase, the only religion that claims Earth as its place of worship is Yoism.

It would seem to be quite accurate.
For the sake of argument, I think it is best to define religion as a particular system of belief. In this sense, atheism doesn't fall outside the boundary of religion even though they have no "theology" they do have a common system of belief - in some areas at least. this also means that Communism doesn't get a pass, nor do Apple fan boys.

For meaningful discussion, I think this is an important distinction to make.