My idea? next time they do the call ups and the front sixteen get their places in the starting grid the refs just say 'ok, you guys in the lead.... you're now in the B race, move over and let the C noobs race.'
The sandbagging doesn't bother me since i'm so far back. What was annoying was to have a sandbagger off in front be rude while lapping me. Just warn me the leaders are coming through and you'll get by.