Caller ID
... makes some people inconsiderate.
"Hello."
"Hey. You called?"
"Yep."
"So what's up?"
"Didn't you hear the message?"
"No. Just saw that you called and figured I'd call you back."
You know, if you're gonna have a voice mail box or answering machine connected to your phone line, you should at least have the courtesy to check it after someone calls to see if they've gone through the trouble of leaving you a message. I wasted a minute of my life telling you something, and sorry if it seems like making a mountain of a molehill, but I'd rather not have to waste another minute explaining it to you again.