Pet Peeve

When people pay for call waiting service and don't use it. These days most people have caller ID waiting. So you know when their phone keeps on ringing it's because they don't want to pick up your call. But when their done with that oh so important call then they will call you. Well guess what? I don' t pick up! I know that sounds bad and immature, but press flash for goodness sakes! OR just tell the person to hold on for a second and notice the other caller. Poor other caller getting ignored all the time...