I've raced for some time on Cargame in the last few years, and although my ping has raised a few eyebrows, it very rarely causes me or anyone else any problems - The CG crew have certainly never kicked me, let alone threatened to kick me for it.
I think the key is to be aware of the problems that high ping causes, and simply avoid them. Don't make sudden movements, try not to drift around corners during close races, leave enough space for other cars to pass safely, and don't actively fight for positions that you know you won't get.
To be kicked from Cargame, you really do need to be causing quite a lot of drama, from what I've seen...