From: Ellynne G. rilliara@juno.com
Whatever Servalan claimed to have done to Blake's body (and may have done to him or someone else), social propriety was probably not uppermost in her mind.
Her actual words were "I saw his body. I saw it cremated." I took this to mean that cremation is standard funeral procedure on Jevron, though that's hardly the only possible interpretation. We don't know if Jevron is a Federation planet or not - if so, then cremation might be common or near universal within the Federation.
As for 'Soylent Green,' the little I know about cannibalism in its social context follows two main routes, ritual cannibalism with the attempt to 'absorb' or keep aspects of the dead and cannibalism as a form of terrorism (although this may also have ritual elements, as with the Aztecs) where it is used to intimidate enemies or subject peoples (educational TV is a scary world, isn't it?). The first probably wouldn't suit the Federation's needs, since they probably like to keep commemoration of individuals in the past (especially as separate entities from Federation glory) at a low level. The second has its points, but it doesn't seem quite their style of intimidation.
Vila refers to cannibalism in Volcano, noting that it had been known to occur in isolated colonies. His tone suggests that it's as much a taboo in the Federation as it is in the 'civilised' world today.
He also said 'gravestone' rather than 'tombstone' in Sarcophagus, but that's just me being picky.
Gan seemed to recognise the grave markers for what they were in Duel (assuming that is indeed what they were), and neither Blake nor Jenna seemed inclined to argue, so the concept of burial was at least familiar to all three of them.
Neil