Nowhere will anyone teach you to dump a street bike to not use the front brake, those people are retarded, it does not matter if they ride a harley or a sport bike. The only thing that comes to mind that has a tiny, tiny bit of logic would be to avoid a high side, but I don't think there is anyone that can react fast enough to realize that they are about to high side and lay it down haha. When I was young and rode dirt there were times that I had gone into a turn too fast knowing I was going to lay it down, but I was going into hay bails and its much better than hitting them head on, but I had gear and did not have to avoid traffic, light posts or mailboxes.