Complex sentence: In some cases, Yelp users that had a bad experience have updated their reviews more favorably due to the businesses' efforts to make it right, while in other cases disputes between reviewers and business owners have led to harassment and physical altercations.
Split into simpler sentences: In some cases, Yelp users that had a bad experience have updated their reviews more favorably due to the businesses' efforts to make it right. In other cases disputes between reviewers and business owners have led to harassment and physical altercations.