Why are scam calls getting dumber and dumber?

Dude this lady has been calling me for effing several weeks now looking for someone- not me but a person I know. I don't pick up but the damn voicemails... It went from "We know your address will come to your house/place of work" to "please call us and give us the address to your house/place of work". If you're going to come to someones house/place of work and you know where it is then why the hell would you need the person to tell you their address? Um. So not only do you want my bank account number so you can steal my money, but you want to come to my house and possibly murder me or something? No. Eff off.
This number is an obvious scam number and when you look it up online there are hundreds of complaints about the number and about the person calling harassing people and their families into giving a bank account number without even identifying who they are or what the supposed 'claim' is.