For nearly a decade, I have allowed visitors to submit comments/reviews, and I manually add them to the website (separate page for each year). My fear is that Panda (or any spam-detection algorithm) may see these as "low quality" pages, particularly if there is redundancy between comments. There are no links whatsoever in the comments. I do not use Wordpress or any other CMS. It's a traditional website.
These pages are helpful to visitors, but could easily be perceived as spam by a bot. What would you guys suggest I do, perhaps mark up the comments in a certain way (to let the bots know they are user submitted)? Noindex the pages? Delete them?
I suppose I am especially interested in hearing the best way to mark them for proper annotation.