Sorry to say, but is this thread really necessary? I noticed that you made post in both threads that has to do with karma complaints, meaning you could have easily made your suggestion there without having to open a new one. But I guess this will also serve a purpose.
Yes, this thread was necessary because via this thread many people can see my suggestions and if they like those suggestion then they can agree with those, in those threads I posted because I was affected by negative karma and somehow karma was in my mind most of the time, that's why I also thought that I should create a thread to know what others think about my suggestions and if they're good enough then admin might implement those into the forum.
A great suggestion has already being provided in the previous thread by @bitmover - make the stat of the karma known for a post without displaying who sent them. This should help us know what post is not being appreciated here so that we can stop sharing them and also to know if someone is abusing their privilege to give negative karma.
Bitmover is a quite reputed member and I respect him and his suggestions a lot. He's also done so much for us by making the scripts and bots. However, I believe my suggestion can be easily implemented because it's much easy for admin to set rules which will allow only moderators to high authority members to send negative karma than adding the stats thing.
I know stats thing is much better than my suggestion and I respect Bitmover's suggestion but we all know that admin is quite bust in doing other things that's why I came with the suggestions because I believe those suggestions won't increase burden on admin's shoulders even he accepts to implement those. Disabling of that negative karma will be even more easier.
-karma helps to fight with these bad habits not involving moderation or harder penalties. And it works good enough. Some newbies who got a lot of -karma in the very beginning improve their behavior. You get -karma? Are you sure you are not doing anything bad? As for the topic starter, he has a habit of answering the first post on the 3d page... I didn't give him -karma for that but if anyone will, I think it will be a deserved -karma. 
Man, sometimes answers of 3rd page also can be useful I guess and especially I try to avoid replying to posts that have more than 5 pages but sometimes when I find it necessary to add some information then why not? Surely if someone else has answered the thread then it's not necessary to post in that thread, even on Bitcointalk I always tell OP's to lock such threads when they get satisfied answers.
I know newbies don't really understand how a forum works but even in beginning they start get negative karma then most of them can get dishearten and may feel a kind of fear in making any posts. The worst thing about negative karma is that it isn't transparent and no one really knows why he/she has received the negative karma.