Everyone, to some small extent, whether they choose to believe it or not.... who's inhaling their pipe tobacco
A balsa wood filter, or for that matter, any filter is only effective at removing some particulate matter and moisture and will in no way filter out all of the microscopic pieces of glass that might possibly be imbedded in the tobacco. Once again, albeit it was painful to do, he did the right thing in disposing the entire unfortunate mess.I wouldn't trash it. If you have a Savinelli just smoke it with the balsa filter to block out any shards of glass...