For the record, the Catholic Church disallows any disposal of the body that is intentionally done as a symbolic denial of the resurrection of the body. Such are all the dispersal methods. Of course, no physical act can prevent the resurrection of the body, but any burial whose symbolism aims at denying this truth is sacrilegious.
At the same time, cremation in itself is allowed.
Together, these two ideas imply to me that there are some people out there who actively destroy the body FOR THE PURPOSE of symbolically denying the resurrection. Is that true? BTW, what are other dispersal methods that are not covered by burial (land, sea) or cremation? I would assume that medical cadavers eventually meet one of these ends, etc.