Over the line: Iron collars, slave collars, etc.

They can have two choices: Iron collar, or Iron cage.

Iron collar: Meant literally. They get a slave collar, "TSA" brands on forehead and both cheeks, then they get sold on the Somalian slave market. If they ever again appear on US soil or US controlled territory, summary execution.

Iron cage: They get stuck in an iron gibbet and hung from a lamp in the white zone of whatever airport they were working at. They get 750ml of water every eight hours until they expire. For some of those 400 pound lard-asses that might take months.

Due process? They get as much due process as they gave the passengers who had to put up with the chatdowns, pat downs, theft, and sexual assault. Working for the TSA is Treason, fait accompli.

8th amendment? Let's ask 12 rape survivors who got the blue gloves what they think about that.