That's like saying a large percentage of X-colored people are criminals, therefore when we see an X-colored person it's reasonable to expect him to be criminal. As a society we have decided that heuristics like this, and prejudicing individuals based on statistics of the group, are not acceptable.

Also, what do we call it when people don't look beyond the writing style, such as at the code, or at the rigorousness of the tests, or at other substances beyond writing style? Slop assessment?