I've posted a little in the past, and perhaps without sufficient explanation, about my experiments with stylistic analysis, which I continue to find endlessly amusing.
For discussions of what stylometry is, see the Wikipedia article:
Stylometry - Wikipedia, the free encyclopedia
or perhaps:
The Professor Who Declared, It's J.K. Rowling - Technology - The Chronicle of Higher Education
Whilst it's always possible that there are a few people who are posting under false pretences (e.g. commercial competitors), one thing that comes out clearly is that a lot of different individuals have contributed to the thread. If there is any such fraud, it's either not widespread (i.e. superfluous) or it is rather sophisticated.
Most contributors seem to echo my own personal experience of the company, which is why I tend to believe that the vast majority of posts here are genuine.