That's not rubber banding, that's giving better items to people further back, which can be a great thing to do if done right. Actual rubber banding is something that Mario Kart does plenty of though - hell, MK is happy to teleport computer players. And it annoys the hell out of me. If they get some better items, okay, I can deal with it. When they get massive speed boosts and teleports... not in single player, thanks.