> generating a barrage of spam or fake news that uncritical readers can't distinguish from human output.

Which could indirectly bring good things: what if this decreases our tolerance threshold for nonsensical texts?

For instance, people might become more impatient when faced with click-bait articles, because they know they might have been written by an AI in order to waste their time. This would let people skip the articles after the first sentence without feeling any guilt or doubt about it.

At least, I hope it might open the eyes of uncritical readers.