I'm always happy to look at specific links. But from my perspective the serious problem is users' tendency to project such categories as "paid shill", "bot", "troll", and so on, onto other users who simply have different backgrounds than they do and different views than they do. There is years' worth of explanation here:

https://hn.algolia.com/?sort=byDate&dateRange=all&type=comme...

and lots of specific explanations here:

https://hn.algolia.com/?dateRange=all&page=0&prefix=true&que...

https://hn.algolia.com/?dateRange=all&page=0&prefix=true&que...