I pick up the calls because I hate having to clear the "missed call" notification. If they leave a voice mail, my entire day is filled with fury. If it's a human and I'm not doing anything important, I usually say something stupid or make gross/odd background noises for fun. I'm not sure if what you saying about the 3 to 6 second stuff is a real thing or if it would make a difference in the grand scheme of things but if so, it would be nice to have a "Punish Them" button on my incoming call screen that does all of this for me.