When I first started smoking pipes (way back amongst the Troglodites), a commonly held theory was that sugar added treatements (read: casings, flavorings, or aromatics) would cause a buildup of undesirable materials in the cake and result in pipes that tasted poorly and/or burnt irregularly. Is this myth or does it have some basis in fact, given that we now know much more about the glorious weed...or do we?