...and the 'beat up' continues..
TCAS and transponders have been around for years. If some lighty pilots think there is a safety issue from not having ADS-B, then they should already have a TCAS, or similar, system in their aircraft - if they don't, then i would question their motives for wanting ADS-B...perhaps profiteering greed is a motive ?
...anyway, ADS-B needs GPS to work....sort of the remains of the day me-thinks...