adding an anonymous comment wouldn't help much, you just would get comments like "......".

If your answer/question is correct/good it will likely be upvoted (up to the level it deserves (if not more)) resulting in an additional +8 for each downvote:  

Example for an answer with a net score of +2:  

         what             | upvotes | downvotes | NET | reputation
        ------------------+---------+-----------+-----+------------
        without downvotes |    2    |     0     |  2  |  +20
        with one downvote |    3    |     1     |  2  |  +28
        ...

assuming the system works... I've seen this happening often on Stackoverflow...   

related: [How do you react when someone votes down your question?](https://meta.stackexchange.com/questions/67207/how-do-you-react-when-someone-votes-down-your-question/67243#67243 "")