Funny story...well, at least now it is! My son called after 3 weeks at boot camp. I was home, looked at the number, and figured it was a telemarketer so I didn't answer. Refused a second call from the same number (persistent SOB). Went and walked the dog and discovered that I had voicemail. Of course, it was my son who had been trying to call!
Even better, my wife was working and couldn't receive his attempts to contact her either - poor kid, a total washout!