Rattleing has its time and place. Sparring vs. fighting!
Learn both of them and when to use them. Pre-rut vs. rut.
You can hear the difference in the sounds of aggression here.
http://www.wideworldofhunting.com/soundsofwhitetail/WhitetailDeerSounds.htm
Don't be afraid to use rattleing but keep your eyes open. They could be standing 75 yards out just watching you.
Good Luck,
Eric
Oh yeh and make sure your gun or bow is ready they may come in quick!