I like the loudspeaker blasting some goofy music. Also, if they set the raft adrift won't it just drift around the island for a couple o' weeks and end up back on the beach (ala demond; and michael & sawyer)

Also, if they buried the bodies wouldn't the polar bears or the boars come and (gross!) dig them up? Wasn't that why Eko and Locke burned the plane with Yemi in it?

Why set it adrift? Why not just have a funeral pyre on land?