You seem to currently have exactly one downvoted comment outside the HPMOR discussion and that at only -1. What makes you think the effects you see aren't simply a result of people actively participating in these threads noticing and responding to comments they deem poorly supported? No following around required.

As for the downvotes, I suspect an overwelming majority of them result from your adversarial reactions to criticism, not the HPMOR content. How many downvotes had this received before you added this edit?

What the hell with the random neg reps, seriously. This site actually has worse and stronger and more irrational groupthinking than other sites I visit. This is bizarre and unhealthy, I think I might not comment on here anymore, although I'm not really sure yet because the quality of the actual posts is much better although the comments are worse.

Edited per thomblake's suggestion.