Some homes have better Gorean principles than others. Some understand more of what it is to be Gorean, while others just play at calling themselves Gorean.
You simply just ... sidestep ... those homes. It's not worth the bother to try to educate them, because they are not open to education. And it's really too bad.
Although
generally Goreans were not particularly cruel, there are those few who were, and notably so. One such person was Surbus in
Raiders of Gor, who regularly abused the tavern slaves and often known to kill them. It is of general convention that others do not interfere in the abuse of a slave. She is, after all, just an animal.
"I had heard the name of Surbus. It was well known among the pirate captains of Port Kar, scourge of gleaming Thassa. I threw down another burning swallow of the paga. He was pirate indeed, and slaver, and murderer and thief, a cruel and worthless man, abominable, truly of Port Kar." Raiders of Gor, page 102.
There was a girl's scream and, from the alcove into which Surbus had dragged her, the girl, bleeding, fled among the tables, he plunging drunken after her. "Protect me!" she cried, to anyone who would listen. But there was only laughter, and men reaching out to seize her. She ran to my table and fell to her knees before me. I saw now she was the one who had served me earlier. "Please," she wept, her mouth bloody, "protect me." She extended her chained wrists to me.
"No," I said.
Then Surbus was on her, his hand in her hair, and he bent her backwards. Raiders of Gor, pages 102-103.
The curtain from one of the alcoves was flung apart. There stood there, framed in its conical threshold, Surbus, he who was a captain of Port Kar. I looked upon him with loathing, despising him. How ugly he was, with his fierce beard, the narrow eyes, the ear gone from the right side of his face. I had heard of him, and well. I knew him to be pirate; and I knew him to be slaver, and murderer, and thief; I knew him to be a cruel and worthless man, abominable, truly of Port Kar and, as I looked upon him, the filth and rottenness, I felt nothing but disgust." Raiders of Gor, pages 120-121.
"Surbus often," said the proprietor, "thus destroys a girl who has not pleased him." Raiders of Gor, page 122.
However, though there was much cruelty administered to slaves, beatings, even near-death beatings and/or rapes (Doreen in
Dancer of Gor came rather close after being confronted by the men she lured to the chain gangs!), I don't recall human wastes used in the humiliation of slaves.