I think in the long run people will be glad for bumps and hate bumps on different race days depending on how it affected them that particular day. I do think that things happen to everyone at some point and a fair way to handle this is to qualify for ANY main, you must qualify at least 1 out of 2, or 2 out of 3 heats. No qualy, no main. I know people can run late and things happen that can make it inconvenient for you, but guess what, others made it on time and respected the schedule, at that point its on you, not everyone else that was able to make it on time.