My buddy works at a sub shop that does deliveries and over the course of three months three drivers were robbed by people placing orders from 'spoofed' numbers and asking for deliveries to abandoned/for sale houses.
Those same people (the robbers) had been pulling that shit in at least four different towns/cities around where I live for about six or seven months before they stopped. They would hit places like Dominos, Papa Ginos, mom & pop shops, etc... one was eventually caught because he tried robbing a batshit crazy delivery guy who fought back and the other two are in jail for different offenses.
I would think that if your run-of-the-mill LEO could figure it out those cats would've been busted much sooner. While I'm sure there's a "way" to do it, it is probably beyond the scope of most PDs resources.