Same as most reporting, they call, they don't pickup, dead air. I get tired of these robo calls and agree that they should be reported. Doesn't do any good but who knows.
Called. Did not leave message. If the number shows up as "unknown," or I do not recognize it, I do not answer, and let it roll over into voice mail. If they do not leave a message, I do not call them back.
I got a call from this number today, didn't answer, no message left. I no longer answer anything from Washington or Oregon unless they are in my address book. Those two states have been a hotbed for scam and political calls. I realize this would be impractical to anyone living in WA or OR, but for me it's an easy straight-to-blacklist.