Watchers (as in Marvel Comics) were suppose to only observe and record in the event any civilization destroyed itself or was destroyed, the information would be there for others. Many stories evolved from some Watchers, particularly, Uatu, the Watcher of Earth, interacting with civilization because of an attachment to it from observing. I do believe the first story was Uatu interacting with the Fantastic Four in order to warn them about the coming of Galactus. Now there's a being I hope doesn't really exists.
Whether there be beings watching us and their powers I dunno. I think it's quite possible that there are some beings as respectful of other beings by just observing and learning rather than interacting, just like there are scientist respectful of life here on Earth that study through observation rather than interaction. I think as far as entertainment media, stories like Communion and Fire In The Sky make it to people's attention because even if it depicts the negative beings, it's more entertaining.
"To alcohol, the cause of and solution to all of life's problems." -- Homer Simpson
"You get what everyone gets. You get a lifetime." -- Death (Sandman)