Reddit generally not at all.
Wait until you encounter HN's incorrect hot-takes that get upvoted to top-comment in a niche field you have expertise or personal experience in - especially if it's in a non-tech field. I wouldn't bet on HNs superiority over Reddit, except for a very narrow band of fields. A comment doesn't have to be correct - it just needs to conform to audiences biases in a seemingly cogent way, right or wrong.
Seriously, maybe some of the criticism of cryptocurrencies here is over the top, but it is not even remotely comparable to what reddit has done.
As far as I am aware, crowd sourcing via social media did not assist with indentifying and catching the suspects.
Your tone is not appropriate to HN.