I'm not about to risk my derailleurs, spokes, dropouts, and my own hide, just so some unknown person won't make fun of my "dork disc". I have a nice Campy equipped bike that had no spoke protector when I got it, I put one on it.
The local LBS has an assortment of them, probably 8 or 10 different ones. Just take the wheel in and have them put it on. They probably won't charge for installing it, and the disc should be about $5.00.