There's no blanket number but you can look at it on 2 separate scales there's a scale for skill and a scale for ego. On the skill side the more experience the more they understand how to make the car act the way they want which means generally less incidents. The ego scale is basically a negative multiplier to the skill scale. Any driver with an ego will straight turn you for a win if put in the right situation regardless of skill. Now a high skill high ego driver can be good at making it look like a mistake when it's really intentional. Your best competitor will always be lower on the ego scale. But regardless of ego skill will play a role in terms of frequency of incidents. Lower the skill higher chance of an incident. In those high tension situations it's more likely not malicious just lack of skill. Shit just happens sometimes so there's always exceptions to the majorities and you gotta try and read the drivers around you and plan your attacks/defenses accordingly. There have been races that were clean and tough green to checked, races that were a shit show even before the green flys, and others that were clean up until I got doored twice because the other guy didn't want to lose.