Can someone make an app optimized on public unawareness?

Let's say hypothetically a spiritual- social-functioning organization existed in more than 10,000 U.S. cities invisible to most (say polling graduating high school seniors in the 90s), wouldn't that seem like in impossible warping of public awareness. Obviously they'd guess they have churches in every city with larger cities maybe having some mosques or synagogues. But the later two are quite out numbered by another, Freemasonry. "What's Freemasonry? We never learned about that in school", they'd say.