The wisdom of the internet dictates having certain pipes dedicated to certain tobaccos to avoid pipes being subject to ghost flavours of previously smoked blends. I have a rusticated cherrywood set aside for lat blends, and a 4-square panel set aside for "fruity" aros. A Washington cob is reserved for lakelands, and the 9mm filtered Molina Hobby comes into play if a tobacco is too strongly flavoured for me, and need toning down a notch.
Guess what - I rarely use them. I don't need to.
Most of my pipe smoking seems to be done in a Mizzou cob, Ozark Cherrywood, or Country Gentleman cob, and the pipes are chosen based on the size of bowl I wish to consume. I use them to smoke whatever I feel like - be it flake, ribbon, shag, English, aromatic.... everything. The Mizzou currently has half a bowl of Dark Honeydew in it, before that it was Macbaren Cube, before that it was Condor Long Cut, before that an eclectic mix of assorted scraps, before that it was SG 2013 Ltd Edition.
Ghosting is more than just a possibility, it's a certainty.
So yes, there can well be a presence of something previously smoked, but it doesn't bother me in the slightest. I'm not a purist, and every bowl I smoke, still tastes of pipe tobacco. I don't enjoy them any less for the crossovers, than I do in the dedicated pipes. In fact in many cases, it can be a pleasant addition. Let's face it, the only reason the ghost scent is there at all, is that I have enjoyed a full bowl or two of something that I wouldn't mind smoking again.
Am I alone in this? Anyone else happy to mix it up and let their pipes infuse and evolve?