DynaMo, the #1 review of the film is written by an account with 0 other reviews, being upvoted by hundreds of other accounts. That doesn't seem dubious to you? Any idea how easy it would be to create a few hundred IMDB accounts and create an upvote circle-jerk among them to impact ratings and perception of a film?
Now, imagine how easy it would be with 2 years planning, 160M budget and WB/Sony backing you...
