Anyone who’s spent any amount of time in this space can spot them pretty quickly/easily. They tend to stick to certain scripts and themes and almost never deviate.
How is that different from humans? Humans have themes/areas they care more about, and are more likely to discuss with others. It's not hard to imagine there are Russians/Chinese people caring deeply about their country, just like there are Americans who care deeply about US.
Ten years ago those accounts existed, too. Back then we called them "people."
In my experience, that's not true. Rather, people are much too quick to jump to the conclusion that so-and-so is a bot (or a troll, a shill, a foreign agent, etc.), when the other's views are outside the range of what feels normal to them.
I've written a lot of about this dynamic because it's so fundamental. Here are some of the longer posts (mini essays really):
https://news.ycombinator.com/item?id=39158911 (Jan 2024)
https://news.ycombinator.com/item?id=35932851 (May 2023)
https://news.ycombinator.com/item?id=27398725 (June 2021)
https://news.ycombinator.com/item?id=23308098 (May 2020)
Since HN has many users with different backgrounds from all over the world, it has a lot of user pairs (A, B) where A's views don't seem normal to B and vice versa. This is why we have the following rule, which has held up well over the years:
"Please don't post insinuations about astroturfing, shilling, bots, brigading, foreign agents and the like. It degrades discussion and is usually mistaken. If you're worried about abuse, email [email protected] and we'll look at the data." - https://news.ycombinator.com/newsguidelines.html