Poison Fountain is top of mind currently so it's understandable I talk about it constantly. Even to my wife. Also I think it's highly relevant to the excellent Harper's article we're reading today.
Whether the Redditors "like the project or not" reflects whether or not they think there is a problem with mindlessness.
What they actually say is almost immaterial. Either it's FUD about malware or illegality or something they imagined without evidence about how easy the poison is to filter. These fictions are just a manifestation of their opposition to the idea.
You can see that among the bot-heads on r/programming (perhaps forced to embrace mindlessness by career considerations) there's nothing that can be said without attack. A dozen downvotes immediately. They actually logged into Hacker News and posted FUD directly to the HN post I linked to. Spectacular.
The opposite is true on r/hacking. Except for a few in opposition (some of whom did unsuccessfully attempt to DDOS the fountain) most people sympathize and agree. They don't want to be dependent on Sam Altman or Elon Musk for their cognition.