I don't remember where a similar topic was discussed. I mean, if a user accidentally clicks the Negative Karma button, of course, as everyone knows, the mistake can be rectified by clicking the Positive Karma button afterwards.
I didn't like this solution, and at the time, I proposed the idea of adding code to display a confirmation message, "Are you sure?", when the Negative Karma button is clicked. In my opinion, this solution would be more effective, but it would, of course, require reprogramming the pages to include the code.