I had forgotten that you can't downvote submissions (after 2.5 years I still haven't crossed the downvote enabled threshold). That does change my opinion somewh

I had forgotten that you can't downvote submissions (after 2.5 years I still haven't crossed the downvote enabled threshold). That does change my opinion somewhat. I do remember an alarmingly large number of duplicate G+ stories during its launch. Given that the main way to manage duplicates (by downvotes) is disabled, I could support some other mechanism. I like the idea mentioned in the comments about grouping similar submissions and have the comments merged.