I also received a call on 8/4/17, the person said my name, I said "Yes this is ____" and they hung up. I called back and no one answered. They called again 8/9/17 but I did not pick up the call. I believe this is a scam where they try to record you stating your name and saying Yes so that they can use it as a fingerprint. I'm monitoring my credit accounts to make sure nothing goes through. I'm also blocking the number. Just be aware that if you get an unknown caller--not to state your name or say "Yes." I was working from home that day so unfortunately I couldn't screen calls as I usually do. I'll be more cautious next time.
Someone told me, there are calls that recording your answer. They are looking for you to say "yes". and this will be used to scam (not sure how), stealing something using your voice. Next time, avoid saying "yes"
Scammers try to trick you in many type of scams by agreeing on whatever they are tricking you into. However, simply saying 'yes' alone without confirming or giving personal info won't do anything. Many calls are simply 'phishing' for information on a number they call to see the reactions of the person who answered.
they call me multiple times a day, and i finally answered today. they told me they were a "consultant" for a energy company and for me to verify my name and address (which they already had). i refused and asked to be taken off their call list, which they refused. the man on the phone was really rude. i ended up blocking the number.