I assume this is in reference to communities like r/antiwork and r/wallstreetbets, which became fundamentally different communities after their 15 minutes of fame.

I'm sure this will happen to r/singularity or an adjacent community where somebody famous mentions the concept and "normies" flood the subreddit with opinions the regulars consider lowbrow.

The answer obviously isn't to gatekeep people who are interested in learning, though the community would have to make some clarifications. This subreddit already has a rule for no low quality posting. Does that include doomerism? Does it include non-empirical suspicions about an AI-driven apocalypse?

If have no idea when this will happen, or if it'll happen at all, and by extension, we don't know what the Reddit or broader Internet landscape will be like. Like many of the topics we discuss, there are a lot of unknowns, and most likely, it'd be best to leave this to the people of the time to decide what they want to happen.