hand the phone to evilgremlin. the poor bastards generally stay on the line for up to 5 minutes, convinced that a parent is going to come grab the phone any minute... even funnier is when tehy think they can talk that knothead into handing the phone to an adult. he's running around right now, yelling, "hello? hi! yes, i'm here! no, mom's not wanta talk to you! no, stop! stop talking! i gotta tell you this!"
it's nice to have finally found a way to waste THEIR time