It sounds a great solution also for SEO optimisation. Hidden comments won't be indexed or badly indexed, right ? And generally, we don't want texts of comments

It sounds a great solution also for SEO optimisation. Hidden comments won't be indexed or badly indexed, right ? And generally, we don't want texts of comments to spoil/rot too much the words indexed in the article. However sometimes we might want to let some comments, especially the most appreciated, it should give meaning to the text above. So maybe you could add "leave the best 2 or 3 comments below the article"