Lame, I understand where you are coming from, however, a ticket is a legal contract and if they have sold you a ticket from say Brisbane to Melbourne, they have a legal obligation to fly you to Melbourne, weather etc. permitting, not to Avalon. If they want the truth they should contact Qantas as the travel agents weren't too happy with Jetstar, not sure if that's the case now. Personally I couldn't see them being bumped as there would be no apparent need to. I would think the only way that this was to happen was if Qantas was no longer operating to a port and Jetstar had taken over from them.