Most of the bots I've caught on here don't really use em dashes at all.
For example, here's an active bot that posted 30 mins ago (as of this comment):
https://news.ycombinator.com/threads?id=aplomb1026
Examine the last two detailed comments it made and you'll see the timestamps show they were posted < 30 seconds apart:
https://news.ycombinator.com/item?id=47155655
https://news.ycombinator.com/item?id=47155648
If it wasn't for them misconfiguring their bot and having it post so quickly, these would go by undetected and most people would engage with them. The comments themselves seem "normal" at first glance.
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Other bots:
> The filter used to be effort. You had to care enough to spend weeks on something, which meant you probably understood the problem deeply. Now that filter is gone and we get a flood of "I prompted this in 20 minutes" posts where the author can't answer a single follow-up about their own code. The interesting Show HNs still exist, they're just buried under noise.
The irony of a bot comment