Anyone else notice an influx of these new accounts in the last couple of years that start rapidly spamming inflammatory replies that seem to be trying to incite arguments (look at this ^ account's comments in the last hour)? HN is a bastion of mostly western, intelligent discourse. I'm really starting to wonder - is it under attack?

I see this everywhere. IMHO that is because we've all found vice signaling is lower cost than expected

Vice signalizing? Intentionally displaying one's flaws/vices? I really don't think that's what this is. I think this is someone or a bot that is trying to get people to react with anger, in hopes that it catches on and causes wider arguments in the thread/social platform. It's very similar to what foreign influence/disinformation campaigns are doing in western societies, but targeted at online societies.

Has been for a while. Most articles critical of Russia end up getting flagged pretty quickly and also tend to get flooded with posts from accounts created 5 minutes prior.