As I said, I think it will only discourage the most obvious forms of clickbait. There's still an incentive to make your headlines a bit louder, try to appeal to more people by making false suggestions, etc.

If you're reading 'De Correspondent' you will see a lot of examples of this: the headlines are not necessary clickbait in the same way as BuzzFeed is, but they still over-promise and are often slightly misleading. Especially the ones they share via social media.