I noticed such a problem on Habré: when someone publishes a dupe (beaten news), it will certainly be a minus - and the topic, and karma. It seems a trifle, but unpleasant - innocent people suffer.
My suggestion is to save such people. Because such minusovat - unreasonable action.
Why? Well, yes, on Boyan topics are often answered: use the search or go to Habr more often. But not everything is so simple. ')
Search
Unfortunately, it works badly on Habré. Try it. I have repeatedly sought to no avail what I once saw with my own eyes.
“Come in more often”
Wait, what is this obligation? As I can, I go. I generate useful content, I spend precious time. Suddenly did not follow the news, and you - all in the minuses.
And I propose a solution: make a button near the topic. For example, when 5 people click on the "dupe", the author will receive a notification.
Although it is possible to solve the problem and easier - dear Habralyudi, just simply treat others with respect. They saw the dupe - do not put a minus just because it is dupe.
P.S. Let's transfer the problem to real life: in the company of friends someone tells the news, it turns out that everyone has already heard the news. How do good friends react? They just say they heard the news. No one will "lower the karma." Lowering karma is nothing more than expulsion from society. Like "On your face! And leave our company: boyansh x ** in! "