Keep the rustlers!
It's deathmatch, not a race server. Races are hard to do but very funny cause you never know what is going to happen. Will Roach and me waiting for you with a roadblock? Rustlers on your ass? People following and shooting you? Passengers doing driveby?
Just take it the way it is, or go to a race/stuntserver. Even I have problems when I'm racing and I curse the motherfuckers fucking up my race, but after all I still can laugh about it. Watch my 'fucking up a race' vids and see how much fun it is. There's is plenty you can do to avoid race fuck ups, like mentioned earlier, hire someone who chases rustlers, or take a passenger with you who can empty his uzi on your opponents, let them pop tires or whatever.