Yep, you guys were right this time, and we've banned the offending accounts and sites.
In the future, though, please email hn@ycombinator.com about stuff like this, as the site guidelines ask. That's the only way to be sure we'll see it. Fortunately someone did send an email; without that, we'd probably never have seen this, and we can't take action about things we don't see.
Are there any plans to add a 'report' feature to HN? It would be much more obvious, as I was not aware that I should email hn@ycombinator.com before today.
In the future, though, please email hn@ycombinator.com about stuff like this, as the site guidelines ask. That's the only way to be sure we'll see it. Fortunately someone did send an email; without that, we'd probably never have seen this, and we can't take action about things we don't see.