QUOTE(joytest @ May 27 2013, 12:23 PM)
You could spend a little time in the Settings section of the device. Enlightening exercise.
Settings > Motion > Smart Alert ?
I turn off all these things from day 1 and I typically forget about it.
*get*

Rest assured checking through the settings is what I did in the first place. That setting in my phone wasn't ticked at all. Looked through the SMS settings as well. Unless I miss something, there's no obvious way to disable it from what I've seen.
QUOTE(PeeEl @ May 27 2013, 02:48 PM)
It is actually not redundant. It comes on for a few seconds. The reason for that I believe is for those who have set pop ups to see who messaged and have a quick glimpse of the incoming messages.
It wastes battery for those who don't need it and the function isn't practical for most real-life situations. Let me give a personal example. With the phone in my pants, I hardly reached for the phone immediately every time I get a SMS. Even if I do, by the time my hands reach in my pocket, took out the phone, (open the flip for some of you), bring it up to eye level, , the screen would have turn off by then.