For example, if articles on Microsoft tend to get driven off the front page, while articles on Apple dominate it, that presents the appearance of the HN community being pro-Apple and anti-Microsoft, which affects the types of submissions and comments that are made, which affects the types of views people feel comfortable expressing, and eventually the types of people who choose to participate. The end result is that the community actually is more pro-Apple and anti-Microsoft, and the cycle intensifies until something close to homogeneity is reached.
As desirable as it is to discourage low-signal discussion threads, is there any thought given to the side effects of doing so?