This has kept me from buying any. Or to put it more precisely, kept me from paying the price for an otherwise ideal pipe. Not especially a fan of the look, but I could live with it if it's a shape I like.
Want to see a real rat of a pipe? You know those leather-covered pipes that were more popular many years ago? Take off the leather to see what's underneath. Frightening. The one time I did, it scarred me for life and I've never recovered mentally--proof being that I sometimes catch myself commenting on pipe forums.
(Seriously, though, I have a leather-covered Longchamp that I found unsmoked on ebay. Smokes great. I assume the ebony stained pipes would also smoke as well as their colleagues in the same marque.)