It Ends with Us was always going to have a controversial element to it, just by the nature of its premise. However, nobody likely expected what has transpired between its stars Blake Lively and Justin Baldoni,

What is "astroturfing?" We explain Blake Lively's claim against Justin Baldoni and the effects of stan culture.

In a social media ecosystem already rife with misogyny, racism and aggression, experts say it's remarkably easy to shape the narrative around a public figure through "astroturfing".