Today, I noticed two questions being hammered closed by “community;” here is one example: How can I appropriately call my professor?. While both questions might have been candidates for closure for the reasons given, I am wondering if this is something I just missed seeing in my years on stackexchange, or a new feature (e.g., using ML to find likely candidates for closure). If it’s an algorithm, I find it a bit risky as false positives will happen, and re-opening a good question is harder than closing a bad one.
See Bryan's answer here. In short: the vote by community user indicates that OP agreed their question was a duplicate. You can see this by mousing over "community" in the question's timeline.