I've been playing Race Driver 2 Demo Online from my comp for a while now and parts of it is very fun like the actual head to head online competition, but what I've noticed is a lot of times people just simply rear end you enough so you slide off the track and fall back several positions. Now for GT4 where cars are most likely like bumper cars how will it be possible to prevent?
I don't know if you ahve played GT Prologue, but when your racing against the computer players you get a 10 second penalty if you hit into one of them too hard (when applied, this penalty slows the car down to 50kph for 10 seconds). The thinking behind this is to prevent people doing as you've described above.
I am also afraid of people that will make a 180 degree turn and go the wrong way. Then they are messing around and bumping everyone... Blergh..
I hope PD adds the same thing that Moto GP2 did : Cars (in MGP2 it are motors, doh ) that race in the wrong way will be "non bumpable". So if you drive into him you nothing will happen. That will keep away alot of people that likes to ruin the fun of other players..
Oh gosh, i hope it's "good enough English". It's late, had some beer etc.. You know..