My above point still stands... Surely we don't need to waste Scawen's resources on some pointless dimensional rift just so you won't have to deal with a minority of idiots who can be spotted a mile away anyway...
Not at all. Mid-race joining is not Scawen's fault, so to speak... It's ours. We join because we want, don't we? If some late joiner crashes the leader in the last lap it's his (crasher's) responsability and he will have to deal with the consequences - just the same as if he crashes the leader in the last lap when he's in second place. In the end there's already blue flags and a "no mid-race join" feature, so I don't see why we need to change this...
At first I liked the suggestion very much. It would not only be nice for mid-race joiners, to do some warming up until the next restart. It could also be the ideal "noob mode", where people who are new to the car/track combo can practice following the pack, overtaking others, etc. without fear of screwing up someone else's race.
However, there is a tiny problem...
Then, the ghost driver would have to go out of his way to avoid the others, because (a) they can't see him, but (b) they can knock him off the track, unknowingly.
IMHO it would be better if it were really a ghost car, without any collisions. (Then again, this looks like it will be a lot of work for Scawen, so it'll probably end up at the bottom if the priorities list.)