- Married fellow Communist Anita Platky, and adopted two daughters, both of whom survived him.
- In 1963, at age 51, he met John Burnside, the inventor of the teleidoscope, a variation on the kaleidoscope, who became his life partner. They moved to New Mexico in 1970 and managed a trading post on a Pueblo Indian reservation north of Santa Fe.
- In 1955, Hay was called before the House Un-American Activities Committee, and although he was not charged with any crime, he dropped out of the limelight after that.
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