We already have that. Observe: ahem “It is an industrial capacity, that many people like the Reddit poem person who does the cow thing. And everyone delighted in the nonsense of words that are sense.” Or, perhaps you want something on-topic? “Your ideas about ideas are mere ideas. Ideas that are ideas are ideas, but these ideas are not ideas. lol!” Perhaps an unoriginal, unfiltered synthesis of some good ideas? “It is a truth universally acknowledged that a potato peeler could save you 5 Altairian dollars a day.”
We don't need AI to produce unoriginal, unfiltered internet comments. Certain YouTube comments sections provide a great example (though the problem with YouTube comments isn't as bad as people tend to make out). We humans already have social mechanisms to keep the good ideas and ditch the bad ideas, even when many of the humans aren't bothering to filter their own output.
But now that we have software that can generate massive amounts of "Mixing A and B" ideas automatically... I dunno, seems like we're heading toward a sort of "pollution of the idea atmosphere" where we get a bunch of remixing of ideas that no human has vetted as particularly useful or valuable or interesting.