the question primarily isn't whether you can make people not be in the world with you, it's if you are using dedicated servers to store your account information and not client side making things server sided
I was able to change some values, but they wouldn't stick. I was able to purchase all the cars, until it said purchased failed on the next screen. Their were around 6 (4 byte) and 2 others that would have a decreasing running total of $ spent.
we have the game downloaded and will be checking it. but every source and mod location i have checked are all reporting that the game's main stuff, i.e. money, nitro, etc. appear to be server sided.
welcome to MMO racing.
No promises and no ETA. Stuff like this I might work for 7 hours only to find that everything I try to do is thwarted due to server sided checks or values.