So if it is possible with comments, does it mean it is possible with voting? I'm wondering how many posts recently came to main page upvoted by bots
There is a whole family of pwdisswordfish* accounts btw. The "b" account's "about" text even has a holier-than-thou attitude about it.
Also people flag strange threads, so the detection is not only automatic. If you notice something strange, you can send an email to dang: hn@ycombinator.com