http://www.cargame.nl/dl.php?id=337813

At the beginning of lap 5 I am about to overtake StFin Kaitsu and go between him and the wall. He attempts to block me, but had I already had begun my overtake manouver. The end result is him spinning into the wall infront of my car. And then in the next turn he revenges.

It doesn't appear so clearly that it was revenge wracking. Just before he hits you the first time, he brakes:



then he tries to get to the apex before you, hits it, bounces off to your side and hits you harder so you finally spin.

I'm not quite sure was it or wasn't it, he was too careful for a revenge wrecker and a bit too careless for a normal racer. I've seen much worse revenge wrecking. He just might've been upset from previous accident and lost a bit of concentration.

Hmm, you might be right. Didn't notice the braking, I have forgot to turn on the pedal indicators in my 0.6B installation.

Why don't you ask him to explain?

I have spoken to him before on occasions, but he doens't seems to be the type that care to respond.

... which then makes it difficult for his own "defense"
If he doesn't bother to defend himself, then just do what you think is the most appropriate.

Perhaps ban him for a few days just so that he comes to the forum? Then you can sort it.