After reading the thread it seems that you are trying to make the whole "corner rights" -thing way too complicated. I would just dump the whole "the right for a corner" -way of thinking and try to approach the situations with different way of thinking, which would encourage close competition instead of pursuing corner rights where 20 people are trying to win a race in T1.
Choosing the situations when to push and when to back off are probably the most hardest part of racing, and usually the uncertainty while trying either one will increase the risk of contact. To have close races, one needs to be able to control the car, put it into right place at right time. One must also be able to see where are the others going, where they are and what are they up to. And all this plus more in tenths of a second. Add the huge variation in skill levels, track knowledge and racing experience and the whole term of "corner rights" sounds suddenly way out of this world. But the point is to be decisive with your doings. Uncertainty is a big factor and is caused by and causes a lot frustration.
Imho, racing situations should never be seen on the basis of rules. Rules are important, but common sense is the base where you build your racing skills and car control. Good set of rules don't help if you don't know what you are doing. If you need a rulebook to tell if something that someone did was plain wrong, you have a lot to learn.
But, imho the key to good races is to know the track, know the car and know the opponents. When you are racing with people who you know well and they know you well, you can stay that extra few metres closer through corners, try harder passes and drive more defensively than you would normally simply because you know what kind of ball game you're trying to play and who has got the ball. In a way, "the idea of ball game" can describe racing quite well. The one who has the ball controls the situation to some degree. However the outcome is greatly affected by everyone on the playing field.
When you are driving behind someone, the question of "who has the ball" depends on many things. Like track knowledge, racing experience and situation awareness. If you're both equal on these terms, then the player in front of you has the ball and you are trying to take it away from him. If he is slower, or a total newbie, the ball is on your hands. One way of thinking would be that he has something that you want, the position. To get it, you have certain outlines what you can or can not do. The key is to understand these outlines, not to memorize them to be forgotten once again behind wheel.
Having said that I think most of my accidents are caused by the simple fact that was uncertain of the other player's intentions or whereabouts. I don't think that I am anything special as driver, but I think that since starting playing online on LFS servers I have got a lot better on judging situations, when to attack and when to back down and this simple skill has saved me a lot of cars and races in LFS.
Uhm, that's it