As a totally crappy racer when it comes to playing well with others, I think it's a pretty decent idea. I'm of the opinion server admins should be able to do what they want..after all, it's their server.
If there is a sudden lack of servers that allow slow drivers to play, I'll be more than happy to host one (or 5, I've got a lot of bandwidth). I'd host one now, but there seems to be little point..there are already a million and five compared to the number of racers.
In the interim, perhaps a better solution than a ban is a gentle reminder that perhaps it's better for them to spectate for a race or two to get a better idea of what they should be doing and where. If they don't respect the admin's wishes in that regard, they have a much bigger problem than not knowing how to drive.
If there is a sudden lack of servers that allow slow drivers to play, I'll be more than happy to host one (or 5, I've got a lot of bandwidth). I'd host one now, but there seems to be little point..there are already a million and five compared to the number of racers.
In the interim, perhaps a better solution than a ban is a gentle reminder that perhaps it's better for them to spectate for a race or two to get a better idea of what they should be doing and where. If they don't respect the admin's wishes in that regard, they have a much bigger problem than not knowing how to drive.
It's hard to know what to do for the best for all of our guests, but OldBloke's suggestion is pretty much on the money.
!
, :sadbananaI is a bad driver and have terrible pb's and wouldnt beabl to connect to that kind o' server
x in xfg on bl! .no chance 
I'm not so much racer as grass-cutter (hey! Improvement suggestion. J/k