It's hard to use automation to tell if the phone call you're receiving is a Medicare spam call, or a genuine call about Medicare for example.

"I buy junk cars" is pretty easy to filter out. Nowadays they send things like "i/buy/any old/car Yconpro/autos*" (this is a real one I got 9 hours ago). But that's still easier to design a filter for than a phone call which only happens over audio.