This is less of an issue if you judge everything that isn’t first hand from a known friend or family member as suspect or at least just a waste of time. Facebook used to be a place to talk to people you knew in the real world. You could ignore anything they reposted and still engage with the actual examples of their own experiences that they posted. But now it’s so flooded with ads and listicles and clickbait and video clips that it’s not even worth trying to keep up with the people you actually know.

It’s still not stealing. It’s plagiarism or fraud or any number of other terms, but stealing necessarily requires the deprivation of a limited, rivalrous thing, like money or property. You can’t steal fame or exposure or credit, except poetically. And by that point, the word becomes so watered down that it’s meaningless. You might as well say I’m stealing your life seconds at a time by writing this extra sentence.

The purpose of using the term stealing here is only to borrow the negative moral connotations of the term, but it doesn’t communicate clearly what exactly is happening.

It’s perfectly valid to say you consider it morally equivalent with theft, but it’s not stealing.