Uh, no. Babylon is defined in scripture and there are a few hints as to the identity even within the verse you reference. Fornication in spiritual terms is to cheat on God - ie to dabble in pagan beliefs and practices up to and including worship of pagan or strange gods. It is, in short, a religion. It is a religion defined by it's name and it's location - Rome. It is a religion who the merchants of the earth have grown wealthy from - the selling of trinkets, of apparel, of candles.. you name it. It is a religion that exists in all nations. And it is the religion of kings around the world. Doesn't leave much anything to the imagination. It is defined but it doesn't have to be. No other religion fits this definition. And it is not necessarily limited to the Roman Brand, Orthodoxy has the same roots and has shared with Rome some of the same errors. Whether the scriptural reference includes Orthodoxy or not is immaterial; but, it should give the orthodox reason for pause.
I thought that your position was that Babylon did not refer to Rome?