Ooh, sounds like some current or ex employee is due for at least a wrist slapping.
It seems like removal of the logo would be appropriate, especially before any attempt to sell this instrument. Putting the logo on a bass that you keep might not be appropriate, but leaving it on through a sale could constitute fraud since it apparently isn't really an Alembic bass. It's much less of a fraud than those cheap p-bass knock offs with the Elan stickers, but it still isn't right.
-bob