Throughout May and early June there were reports of high volume bulk upload Mapspam for Earthlink, BigLocal and Computer Assistant. These listings were national in scope and often noted that the listing was Not a physical Location. Google apparently pulled down the publicly reported Mapspam.
It is of interest to me that Google, while willing to go in and apparently hand remove these abusive listings do not take the time to find similar listings, obviously posted in much the same way and perhaps by the same people. Go figure.