I am at the point where I have lost all confidence in people when it comes to voice mail. When I leave a message for a almost anybody, I do NOT expect them to return the call. It does not matter who the person is or what the call is about.
I think it was actually easier to get people in the 1970's than it is now. People didn't have answering machines or voice mail at all. You simply called them until they got them. And, of course, people also answered their phones.
Most people don't answer their phones nowadays, and about 75% of people do not return phone calls promptly if at all.
I often simply just call people over and over instead of leaving voice mails. Voice mail has become a waste of time most of the time.
And with the advent of caller ID, there is another very annoying pet peeve to deal with. The very few that do call me back simply ignore my instructions on the message. If I leave a message saying to call 555-1234, I expect the recipient to call that number. I do not leave a phone number for kicks--I leave a phone number for a reason. In fact, the phone number is the first thing I leave in voice mail messages; and I leave it twice. If I wanted you to call me back at the number I am calling from, I would leave you that number.
I'm totally fed up with voice mail. I have a feeling I'm not the only one.