So,I think negative score is the worst way to learing others
I am sensing sometimes a score is not for learning better

If you look at the negatives, you will realize they are basically "you do not want to learn".

Where is the desire to learn in "gimme code"
Where is the desire to learn in flaming
Where is the desire to learn in trolling
Where is the desire to learn in not posting something useful
Where is the desire to learn when not searching

In other words, for all practical purposes, if you want to learn, you do not get a negative score.

Always say your idea even it was wrong
That may be good and well speaking with mummy, but here are several participants that will take a wrong idea and run with it. I have - not here, but face to face - tried some outrageously wrong postulates and seen juniors taking them and implementing them. Then, of course, I tell them that what I stated was wrong and just a check to see where junior was in knowledge. Here in the forum someone may take the wrong statement and say" that is what I needed" and read no further, thus it is essential that wrong posts get labelled as such.

So, we can discuss if there should be a rating system at all, but the negatives are not what you make them out to be.

Erik