I think you're underestimating the power of the CTRA to bring about a change in general standards Sam. Whilst the issue of whether it is right or wrong to crash after races is down to you guys and how you want to run your server, the fact is you're one of the few operators to consistently have not just a busy server, but multiple busy servers.
If the CTRA says something is not on, let's say 'rejoining into traffic' or that something needs clarifying, like defining who exactly does have the right to a corner... well as you can see from the examples the CTRA has brought about changes to general behaviour in LFS before.
So I dont think the argument that "It cant be stopped, its what people do" is necessarily a valid one.
Whether actually bringing about a change is necessary of course is another matter, or whether it is the biggest outstanding issue with public racing standards, now that's a question i'll leave to you guys.