The Forums standard response on this is, if you might ever resell the pipe, leave the stinger, or if it is removable,
remove it but keep it in a safe place labeled, so you can sell it with the pipe. Kaywoodies need the stinger to
screw the stem to the shank. My Kaywoodie has the stinger, unmodified, but does't gurgle. Who knows why?
I check pipes, if possible, to make sure they don't have a stinger. Some Parkers do, but I found one that doesn't.
My notion is that most stingers were developed as a sales feature when pipe marketing was highly competitive,
but they don't do much good and are no longer a selling point, in fact are a dis-incentive.