At one time our house land line was my business phone. When a call comes in that is not marked as "Spam", I may answer it if I am at my desk. When I pick up the handset, I answer as if it is still the business line.
Often, there will be a long pause and then a "Boop". I am told that "Boop" is when the call get transferred from the dialing system to a person.
The person will often ask if they have me. At this time I sound very annoyed and tell the unfortunate that I had given my name when I picked up the phone and maybe they should listen. My next remark is "What are you selling?"
I too enjoy (when I have the time) stringing them along as much as I can with the hope that fewer people will be disturbed by them today.
Matt