Originally Posted by RockyBoy

SkyWest has been known to do this on a regular basis. They were using positive space to bring UAX guys to SLC on mainline DAL flights for training a few years ago. If they are being used for non Delta flying or training then they need to have a purchased ticket just like a mainline UAL pilot would have. If they don't and they are bumping revenue then you should tell the agent to deny them boarding and call the CPSC. We left more than a few behind in ORD when they were doing this a few years ago.