An increasing number of HN users are now lazily downvoting things they disagree with, simply because they can't be arsed composing a coherent rebuttle. This leads to unpopular ideas being buried, groupthink and a lack of intelligent discourse.....

....And yes, this IS leading to this place becoming more and more Reddit like (no, that isn't a tired cliché, no matter what the FAQs claim).

Downvoting should be reserved for comments that detract from the conversation. Perhaps meta-moderation is needed to ensure this happens.