A saw a thread on this subject 15 years ago where some guys came up with the idea to put bait/bait ball stickers on the bottom of their kayaks for offshore fishing. Like mentioned by CC earlier, its much more important to make as little noise as possible. Sightfishing for bonefish on very shallow flats I noticed that they could detect my presence from over 60 yards away if I wasn't careful. As you paddle forward and slow down or stop to drift in, when approaching fish, your kayak sends a small bow wave ahead of you. On glassy water it is much more noticeable but the second it (ripple) reaches any fish, they know you are there. When possible, its much better to approach your spot from the down wind or down current side, or drift in if you have to approach from upwind or up current.
A good rule of angling philosphy is not to interfere with another fisherman's ways of being happy, unless you want to be hated.
Zane Grey, Tales of Fishes, 1919