I never raced F1 2010 online, but I Have raced just about everything else (GTR2, NKpro, iRacing, race 07, rFactor). Idiots are idiots. There is nothing that can be done except organize races on sites like this one.
In racer 07 every public race there is at least one idiot (and usually not one that has any aspiration of finishing ahead) that will resent that either you passed him, or that you qualified in front and his racing strategy is to simply wait for the next hairpin and punt you off the road.
I usually try to adopt a strategy that prevents them from doing that. I often can see in the mirror the overaggressive shifting and braking, the weaving for no reason and so forth. Often before getting to the turn just tap your brakes as if you are braking way early and they'll brake too. It will give you a chance to make the turn without having them on your butt.
That's called brake checking and it's frowned upon, but sometimes if you are sure the guy is going to take you out there is no other option.
I Have also found that taking non orthodox lines and try to power through as fast as possible works. In order to tap you and wreck you, you have to be on the line, if you are off their position wont be as easy to reach.
it's too bad these guys don't employ the obvious skills they have into racing smarter rather than wrecking. Someone should tell them it's a lot more fun to pass someone that to wreck them.