Throwing grass to check the wind

Is it just me, or does anyone else think that throwing up a few blades of grass to check the wind is a little pointless?

Do you mean the wind will be different 50 feet up in the air than it is at player level so pointless?

Kind of, yes. Harks back to Amen Corner at the Masters, where the commentators were saying how the wind swirls and changes so much it makes the shot very difficult. Tiger kept on plucking a few blades of grass and chucking them up to see what happened. I thought to myself, "Okay, you've got skin with hairs and follicles, surely you can feel what the wind is like on your face, but as well as the fact that the wind there's going to have little or no effect on your ball as it whizzes away from the tee at 140mph, it's also going to bear little resemblance to the wind 50 feet up or way down there near the green".

I know that people take a look at the trees too, and I do that myself to try and guage wind speed and direction where my ball really might get affected. But yes, I just use myself as the wind-meter where I'm stood, and I guess from my kiting days I'm pretty good at judging the situation.