Sam's left behind 4 of these things. I don't know if he ever communicated where he left them. (OOCly, one got chucked out the van window, one was left on a store counter, and the other two were left in bathrooms. But I don't think anyone knows these details except Sam.)
What would the average person do when confronted by a burner comm broadcasting a semi-delusional ARO? How many would steal it (as they cost ¥100 and have value) versus how many would leave it there? That, in turn, could be used to estimate how many people would see it before the message was taken offline.
Doc would guess that only a handful of people would see a comm before someone overcame their concerns about hygiene and decorum to pocket the freebie. Between the four comms, that might come out to two dozen people or so. The odds of one of those people being the type of person who would care about the ARO, or who would bother to forward the message to large institutions that he or she probably has no connection to, or to any other party that might interfere, seems slim. Not zero, but slim.