Don't know who this is, called and no message left. If I don't recognize number, I don't answer. No message left either. So I have blocked number!!

<<  Don't know who this is, called and no message left. If I don't recognize number, I don't answer. No message left either. So I have blocked number!!>>  Same here.  I don't know anyone in Palo Alto so I blocked it.

ID says: "6506811007".....  Caller ignored the screener's warning, and said / did nothing as instructed by call blocker. Call, say nothing, ignore the screener's warning, and you get blocked! All scammers and unknown, unspeaking callers get blocked forever! Good riddance!

Called at 7:30 PM -- HATE these evening calls. Left no message. Blocked.

Guy doesn't realize he's on the line. "Democrat vs. Democrat...hmmm...  California.   Count all 16...one of these. Make them camel fresh menthol." Phone bank of people in background. Answering machine cut them off.