I do not do that, but don't really mind what others do.
I saw a guy come into the Tinderbox, Tacoma and buy a brand new Nording pipe, having smoked his old one to death (cracked due to cake/abusive smoking). I talked to the owner after and he said the guy just does that: buys a pipe and smokes it to death then replaces it.
I only met one guy who did that. I think he smoked the whole time he was awake, just kept piling it on top. Another odd thing was he would never trim back his cake, he would just smoke until the diameter of his bowl was too tight to get his pipe tool down into (or I assume crack, but the ones I saw were in one piece). What was hilarious was he made the statement "I can't figure out how that happens?" even after being told and shown how to ream a pipe.
I saw a guy come into the Tinderbox, Tacoma and buy a brand new Nording pipe, having smoked his old one to death (cracked due to cake/abusive smoking). I talked to the owner after and he said the guy just does that: buys a pipe and smokes it to death then replaces it.