It seems pointless to go through that exercise if you're going to share that phone number with people who doesn't share your dedication to OPSEC (for a fictiona

It seems pointless to go through that exercise if you're going to share that phone number with people who doesn't share your dedication to OPSEC (for a fictional argument, recall Zero Dark Thirty where they essentially find OBL because a guy calls his mother). And once you're there, you don't need PSTN numbers, which means you can leave Google out of the equation.