The Sidewalk Syndicate has always used the handwritten word to communicate with other earthbound Angels who are on the road. It’s a way to pass information that can truly only be read by the receiver. Analog messages are harder to intercept and more difficult for the Demons to understand.
Messages can be simple: “Lost Dog, if found, please call Dan.” No details, just that. The Syndicate knows that Dan is Daniel, one of the Arc Angels and they need to call to get their next assignment.
Or the Nickel Ad drop boxes provide ample opportunity for messages to be left. Half a shopping list, a torn part of a receipt from the dry cleaner. Only the Angels can read the sigils and markings underneath the words. All messages would be completely innocuous to anyone, apart from the Angels that is.

The messages lead to drop offs at bottle collection centers or sometimes meetings at local shelters. Information is shared through the smallest of gestures, the handing over of a seemingly empty bottles with notes wrapped around the labels, tattered plastic bags, layered upon one another containing a change of clothes, of identity and a new mission with coordinates and contact information tucked into the linings of the shoes.
Once the agent was at the new location, more information would be shared, and the mission undertaken.
In extreme situations the neural networks are employed from the Heavenly Communications Hub. The Syndicate avoided the neural networks whenever possible because the residue of some messages could be picked up Demons, or, in some cases, empaths.
An empath, moving unaware among the Syndicate or who had come into contact with an Angel could sometimes pick up a stray messages, odd images or bewildering instructions. The stronger among them could resist, the more sensitive the empath the more susceptible they would be to the vibrations that were swirling around the Universe.
Sometimes the sheer volume of the messages would cause empaths to experience migraines or nausea. In extreme cases it could cause seizures or mental breaks.
The intensity could cause the empath to mentally depart from all that they thought they knew and suddenly experience a blinding clarity about the world around them and simply be unable to process it all.
No one could listen to low frequency and incessant Angel chatter and not go a little mad.
Besides, the fact of the matter is, even the self-proclaimed Christians don’t actually believe that Angels whisper in your ears, let alone scream through your soul They thought the Demons might do that, but never the Angels.
Then there are those souls who live on the knife edge of anxiety and the input of so much information into their minds would push them in committing deeds and actions outside the realm of decency or common sense. Some have proclaimed themselves as ‘the chosen one’ or as ‘the new messiah or ‘the megaphone of the Lord!’ at various times in history. Jonestown and Waco to name just two examples.
Or others turn their mania into running megachurches, or multimedia conglomerates turning their ‘gift’ into cold hard cash.
Whenever any single person claims to have the true word of the Lord, step away slowly, God is too big, too vast, too otherworldly to choose just one being as a vessel anymore. The first time cost him his son.
God is many things, a slow learner is not one of them.