Yeah, it can be frustrating. The school I did, the FAST riding school at Shannonville Motorsport Park, Ontario (Canada), did not allow passing on the corners at all during our free rides, only on the straights. So of course I get stuck behind this guy who, while he held me up in the corners, would pin the throttle on the corner exits, making it very difficult to get past him on the restricted 6R's we were using. I followed him for a little while, unable to pull him on the straights, until eventually I outbraked him into a corner and got around him. Funny thing, he then started to fall behind very quickly.