Sad to see this kind of behaviour is still around - but then again, why am I surprised? I didn't go online much after the first few times, just enjoyed the game instead.
Once I found out about the 'S' level and tuning my cars last week though, I hazarded a few races. Maybe I was lucky then, as no dirty players showed up, even on Suzuka East (well, one did try to side-swipe me...but he ended up making a fool of himself.)
Today though they all came out to play - even the faster cars were swiping at me while they passed.
I suppose I'll have to wait until GT5 for clean online races now, as none of my friends play Prologue, except for one in the US who isn't on so often.
Now, tank racing might be a solution!