I mean, it’s not a secret. That’s what the clause was almost explicitly for. Slaves freed, vagrancy or similar becomes a crime, former slaves become prisoners because people won’t give them jobs so they don’t live in a house (also at the judgement of legal/judicial officials as to what counted as housed), many go back to the same plantations/workhouses they were already at.
It didn’t slip through, it’s not a conspiracy theory, and it isn’t the quiet part being said out loud. It was always loud.
If you go by the recent California ruling, that could soon be violation of free speech.