If anything, they should put some kind of minimum lap time requirement out there, or at least be more strict as to who can start racing. Granted, everybody has to start somewhere... but maybe it's a good idea to require them to take an advanced school or something first
This sort of comment surfaces in every sport, from roadracing to skydiving to mountain biking to golf:
"The newbies don't know what they are doing and are in the way!"
This comment typically comes from someone who hasn't been in the sport all that long, but now feels he/she is an experienced participant.
Everybody was a beginner once, everybody started slow. Some are slower than others, but people come with different skill levels and different amounts of talent. Nothing is going to change that.
Basically what you are proposing is to place more obstacles in the way of people who want to try racing. Make it so tough and so expensive to start that lots of guys won't even try.
Don't forget that these people pay license fees, gate fees and entry fees too. They are supporting the sport. Without them you would be paying a LOT more money than you are now to race, or perhaps you wouldn't be racing at all.
There are all kinds of schools that try to teach you the finer points of motorcycle control, but the only thing that can truly teach you how to race and how to become a faster racer is to go racing. There is no substitute. So, the newbies have to learn somewhere. This is where they learn - in Amateur Racing (remember? Amateur!).
So, if you're so good, what are you doing in Amateur racing? Shouldn't you be a Pro already? Come to think of it - if you're so good, why are the backmarkers causing you a problem?
Sorry if this comes across as a flame; I don't mean it personally, but it really irks me when I see someone advocating punitive or discriminatory restrictions for amateur sports participation.