You purposely pick up and sit in silence? Not even a "Yo", "Sup", or "Aye"?
I wondered why people have been doing that when I call them at work. Sucks to be them, they've been waiting 2 weeks to 2 months for an appointment. I just hang up and move on to the next. If they didn't want to talk they should have let it go to voicemail.
And that's why I don't feel too bad moving on to the next. If I'm calling someone, they had to have called me at least once already. If they're too lazy to save the number and want to play silly games, I have better uses of my time. I was just curious of the thought process.
I just hang up as soon as I hear that little "bloop" sound and that cuts out 90% of them.