@ehBeth,
To be honest - blocking has little impact. These scam robo calls change numbers that they are calling from frequently sometimes even using your own phone number...yes I have looked at my phone to see what number is calling me only to see that same phone number apparently calling itself.
I do not answer calls I do not recognize from my home number, however, as I do not know all the numbers that I expect to get calls from for work I answer each call.