What's to stop someone from using their own address for the Pro Shop information? If Motiv contacts you, just tell them you drill your own equipment and do not have a relationship with a local pro shop. You should be just as capable of drilling out the USBC logo on the Jackal/Carnage and sending the backup photo as would any dedicated consumer pro shop. Besides, there are a lot of PSO's that may have these balls for themselves that want replacements, so for Motiv to see a customer have the same address for both their home and Pro Shop shouldn't seem unusual.
Since you are only drilling your own ball, and it is less than 8 balls, wouldn't that also qualify you for an additional free ball as well under the exchange program? Would Motiv deny a home driller the bonus ball even if photographic proof is provided that the other ball had the USBC logo drilled out and the serial number matches the one submitted by the customer on the exchange form?