We've already got a lot of bots doing auto-curation, where posts are being upvoted without being read, so it was only a matter of time before bots were creating content too.
It's easy to identify AI content - it doesn't have slang, or current political/cultural references. But only manual curators can tell... :-)
I suspect that depending on the background of the curator, they might not tell either, unless they know what to look for. I see a lot of AI in news articles that people read as if it was written by a journalist - and they don't know the difference.