Being specific, assorted feminist critics of YC/technology have complained strongly about HN comments being skeptical, not toeing the party line, etc. In the mainstream media, it's not too hard to blame YC/you/Altman for views that commenters here might express.
Similarly, such critics have also complained about cursing/mysogyny/racism in github repos and implicitly attributed them to Github, Inc. (For example, I don't work for github, but github could be blamed for the fact that "I have no fucking clue why this speeds things up": https://github.com/scalanlp/breeze/blame/master/src/main/sca... )
You suggested in some previous discussion on this that people who use the endorsing power incorrectly (I don't believe this was clarified but I haven't followed this endorsement thing closely [1]) might lose the power to endorse. Combining endorsement with filtering the "bad" endorsers could certainly work to steer the sort of comments that are endorsed. Rather than filtering all comments one need only filter the much smaller group of endorsers.
If you say this is not the goal and the plan is not to do this, I will drastically reduce my estimate of the probability that this is the goal. But at the moment I don't find it implausible.
[1] Most of the time I waste here is waiting for computations to finish and code to compile. But I imagine if I stopped commenting here I might be more productive, so I'm not personally strongly opposed to changes that might push me away from this site.