Once again this is not car racing. it is kart racing. It is not SCCA it is CSC. I again agree with Charles. The blue flag is meant for lapped traffic, period. It is not the responsibility of the corner worker to make the determination of who is fast and who is slow. His job is to watch for accidents and keep the racers safe. In no racing is there a flag for someone on the same lap that is slower then the rest of the field.
I had an 80 driver at STARS Reno a few years ago that was not as fast as the front field but ended up second in the final because he got a great start and was very hard to pass. You could see that Cole Whitt was doing everything he could to pass him (and he was the class of the field) and yet the officials never threw a flag. My driver was a bit slower but still earned the trophy.
Every year there are people that try and change the way the races are run. Every year (to their credit) the officials run the series the same way with great success. I am truly sorry that you had some early incidents and hope things get better for you. Unfortunately, you will not find a solution to this problem anywhere in the country (or around the world). Just be thankful you do not run in Europe. They will plow into anything in their way. Bumping is a way of life for them and is only racing.