I realize that you allow piggybacking, since you claim you can't control it. Or lack the balls, to lock the lobby's. I have a possible solution. for the situation, Treat it like bracket races. I look at each lobby like a bracket, Example 1630 lobby (1626-1630) is the 12.5-11.85 (best unboosted ET i've seen), 1635 would be 12.00 to 11.35. I propose a stagger start, in accordance to the lobby the car belongs. For instance, there is roughly .5 second difference between the 1630 and 35 lobby's the racers would get the light based on their cars rating. This would allow piggybackers, to play as they want. But also provide a more fair racing experience, for all racers. This, as well as the coding problems with the Hacks/cheaters, is stopping me from spending any money in this game. To be honest, I'm stuck at level 250 now anyways, so probably won't invest anyways. But would give a fairer fight, than currently available.
BTW my definition of piggybacker, is Weak players with maxxed cars, that can't compete in the proper lobby