Sounds like it isn't the CLASS that's the issue, it's selfish drivers. They need to have a chat with a Steward, or from fellow competitors.

I've seen backmarker ITX drivers duking it out with front running ITZ drivers here in our area, and the drivers were given some ribbing (talking to) about the way they handled themselves. That problem corrected itself.

Simple rule, if you aren't running for the front trophies, don't insert yourselves into other class cars that are. Suck it up, drop back and carry on. Od get on the stick and get ahead of the battle.