Here's the thing, there are secret organizations who conduct secret operations.
In my neck of the woods these organizations are the FSB, Mossad, a few other foreign intelligence services, and the biggest operator being Chinese State Intelligence. They target Silicon Valley companies and their employees throughout the Bay Area and south into Monterey County where the Chinese run smuggling operations through the Big Sur coast.
They don't advertise. They don't use secret symbols. They're not on social media in an active way (although they certainly use it to their ends). They don't hold meetings in Pizza Parlor basements. They do not conduct rituals in the dead of night.
They only way we know they're here is after-the-fact when someone gets caught. And those people usually know a limited vision of the operation of which they were a part.
The idea that secret organizations leave clues is stupid.
Freemasons have their own temples which are clearly marked, and their members are free to wear whatever symbology on their lapels, cuffs, belt-buckles, or things to stick on their vehicles. Same is true with the Knights of Columbus, Opus Dei, and the original Church of Satan.