Off-topic, but in reference to one of the dead comments in this thread, can't help but noticing that HN became a subject to a heavy trolling. After seeing Twitter-like interactions here, wondering if there are any built-in tools to prevent HN from becoming as an aggressive and uncivil as Twitter? I mean aside from manual flagging?

Also curious what led to this. HN seems to be very constructive and pretty boring to attract a Twitter-like action.