I don't get why folks don't answer unidentified calls.
I never answer calls from an unknown number. If it's important, they'll leave a message. Although if I was traveling in a foreign country I might be tempted to pick up, just in case it was an emergency situation, but if I'm in America I just let it go to voicemail - and then type the number into Google to see what the results are. Sometimes it's my energy company, others is a blood bank or alumni center, but more often than not it is a scam robocaller - which means answering gets me put on a list of valid numbers and increase the number of calls.