I myself have a lump of coal of the Titanic, and i felt guilty about owning something which came off a gravesite, but then i thought to myself that it is better in the possesion of those who will appreciate it and take good care of it than someone who would look at it and put it in a cupboard for whenever they want to show it off to someone and therefore cared little for it! Then I thought that if Titanic inc. was telling the truth about raising funds for the preservation of her hull, then a lump of coal which probably did not come in contact with anyone seems like a very small deal seeing that they picked it up form the middle of the debris field and therefore has little impact on the Titanic, i'd much rather they preserve the Titanic's body than a lump if coal of which there is a vast quantity! There is only one Titanic after all!