This is one more thing I didn't know.
If a person's radio didn't support cross-mode tones they could always just the leave RX tone off. They would receive all traffic on that frequency in range but that probably isn't too big of a deal.
I, too, avoid Goober Operated Repeaters. There is one GOR in an area I travel occasionally, that after seeing the clues, decided it would be to my benefit not to use the repeater.