Interesting thread.
One of the things that has always puzzled me is the lack of transparency in airline ticket pricing. For example an ad might promote a fare of as low as $10 for a route but then in the fine print it will say 'not available on all flights and limited seats available' etc. The reality is that most people travelling on that route will be paying way above the minimum advertised price. This is not the case when catching a bus or train - pretty much everyone pays the same price for the same level of service.
I personally would like to see much more transparency in airline price ticketing.