Movies like Mel Gibsons "signs"

great point, thanks for bringing that up

i got to admit, this is a point im a little inconsistent on
"the others" has ghosts in it, and i like that one
"poltergeist" on the other hand

not sure how i decide what is acceptable and what isnt, i guess a lot of it is if the ghosts are evil or not
Their appearance is unpleasant, but not gory. And they're not evil. To avoid spoiling I don't want to say more.
Based on what you said, I think you'll be fine with it.