Fl IAEI had a long discussion about this around 1996? when this first showed up in the code. They decided if there were extra wires, beyond what held the ceiling up, you could use these supplemental wires for support. Then the question became, which wires were holding up the ceiling and which ones were extras for wiring method support. They decided common sense would prevail and you should be able to spot the pattern the ceiling guys used and identify the extras.
