Why Even User Video Game Scores Can't Be Trusted Any More
We've really ruined our trustworthiness.

Review bombing occurs when a group of people works together to flood online review sites with many negative reviews. This is commonly a retaliatory tactic that's used even if the game itself is good. This practice damages the trust in user review systems by skewing a game’s overall rating and shaping how people see it, usually for reasons that have nothing to do with a game's overall quality.