The show isn't out to convey any specific/overt positive messages; it's mostly concerned with promoting the existence of ghosts and other paranormal activity.
Some stories describe how the deceased were abused during their lifetime. Children's deaths are also sometimes discussed. Some ghosts allegedly throw, push, and/or harm things (including animals). Some of these events are reenacted, but the actual violence is blurred.
Words like "hell" are audible. Occasional stronger curses like "s--t" and "f--k" are bleeped.
The show's focus is more on the celebs' creepy encounters than their fame and/or performances.