In addition, HN doesn't get much of the "classic" troll crowd (no matter if 4chan/8chan/outright real Nazis/gamergate) or Trump supporters - from the occasional politics thread aside, there's nothing much of interest for them here, and so the biggest blocks of trolls simply stay away.
The moderators here are very good at doing work upfront to save themselves work later, by making the site infertile ground for troublemakers.
this is why.
"If you voted for Trump, you're at best a troll but most likely a Nazi"