I totally agree. Do not answer unknown calls and do not call them back. That is my practice. I do not answer, but will Google the number to see if it is a scam, then block it.
Caller ID states, "Livingston CA"... Called Saturday morning at 10:36AM... Picked up and hung up! Bad enough scammers call several times during the week, but weekends too~! WTF! Wondering if this has to do with the Yahoo breach?! There should be a law that no one calls you, unless you personally give them your number! Tired of this sh*t!