YALE Y Heads
It's the FRATERNIT[Y]
Skull and Bones was/is Phi Beta Kappa:
Dangerous and Detrimental: Greek letters generally used consist of two or three Greek letters, i.e. ΦΒΚ, often the initials come from a Greek motto, which may be secret, but not in this case: Phi Beta Kappa [ΦΒΚ] stands for philosophia biou kybernētēs = Philosophy is the helmsman of life, – a helmsman is a person who steers a ship, sailboat etc. – As this is exactly how the members of these fraternities view themselves, as after all they’re being groomed to become loyal servants of those who run and control our world, via these kind of helmsmen and women.