Not that the average Chewer will gang up on newcomers, per se, but we're known for being vocal about our opinions.
Once you get to be a regular around here, for instance, you start to notice a general consensus on certain movies. Now, as is the case in any community, when hype and expectations have been built up there can be a considerable backlash. This may be an individual looking to be a contrarian, but if they're vocal enough or make a strong enough argument then there will be agreement. Eventually that agreement leads to a new consensus, and so on and so forth. For instance, I've noticed that the average Chewer will dismiss American Beauty as Oscar-baiting fluff, although back in 1999 it was lauded as a modern day classic.
By comparison, since we're known for being a niche culture but also open minded cinephiles, a Chewer may argue in defense of a movie that has been condemned by the general public. These defenses range from a movie being misunderstood, not being marketed right, or being so bad it's really good. As of late, for instance, Batman & Robin has been making the rounds on several sections of the boards. Oh yes, it has defenders, they are vocal, and viewing that movie in a new light seems to be catching on.
So I figured this would be a good time and place to document which movies have been experiencing backlash on the boards (or in the general public, and do we agree), and which movies have had some turnaround.