I personally use the word "Speaking" when an unknown caller asks for me. So far that has worked for me. I have yet to have anyone try to get me to say "Yes" if they ask again looking for a yes - I will tell them you already asked that and I already answered it.
Never say yes - scammers can and DO edit their recordings to move the YES to where they want it to be in the conversation.
don't know who they are or why they are calling for the elderly lady who had my number 3 years ago. I've told the truth (she no longer has this #), I've ignored, I've told them she's dead (don't *think* that's true...) but ALABAMA has called religiously 2-3 times a week for the past 17 months!
It's an Alabama highway patrol/sherrif's department/state trooper and they'll ask for money. If you say no they will call you heartless. I feel confident in labeling them the scum of the earth.