Why the hell would I spectate if the other person does? Eye for an eye eh? Isn't that a bit medieval?
I'm racing to finish my races and try to do as well as possible.
If I happen to cause an accident, I will wait for the person I've crashed, but I won't wait forever if they're not showing any effort of continuing the race. I won't stop to wait since that'll quite possibly cause more harm than good. I will keep driving and as soon as the person closes in I'll let them pass in a safe and predictable spot, much like I'll do with blue flags. This way it might take a lap or two for the person to eventually go past, but they will.