I prefer not to blind call. The only deer I have ever had respond to calls and rattles are bucks I have seen moving, and then I could adjust my calls to grab their attention. I think it is very important to be able to read a bucks body posture and responsiveness when calling, especially as Jeff mentioned, when your herd is not balanced, or your area is pressured.

I remember seeing a buck last year on November 5th 1 hour before dark. I grunted to him as he cruised a bedding area for does. He walked 10 yards to me, then stopped 50 yards out. I saw him again 5 minutes later, I tried a low grunt, he looked and watched but was not an aggressive buck at all. I then grunted loud, and he walked away and never came back. I decided to give him two days to cool off from my calls. I came back in two days later in the morning. I told myself I would give a very light rattle of the rattle bag 5 minutes after sun-up based on his passive nature. Sure enough, he came by, I rattled the bag ever so lightly and he responded on a rope. I arrowed him. The point is, blind calling in pressured areas or areas with an unbalanced herd, does not allow you to read the deer and his responses to the calling. I think in my area, blind calling does alot more damage than not calling at all.