While PO boxes work, you would have had to set one up prior to getting any licensing since past addresses are retained in the system as well. And then you are paying an unending fee to maintain a PO box just to try and maintain some slight privacy online.
It really is baffling they are so stuck on having full address available to the world. City/state, zip code, Maidenhead locator squares, or a number of other options would be more than enough to place one into a local area without an exact address listed publicly. Until that happens, I definitely will continue to refrain from mentioning it on any online accounts to help keep all the data miners a little more at bay.