Should obese airline passengers have to purchase a second seat?It's holiday travel season, and that means we have to deal with all kinds of travel hassles. But how much is too much?

A flight attendant snapped this picture of an obese man jammed into a single seat to show management seating issues on the plane, and it has a lot of people talking. Some are angry that the photo may have been taken without the passenger's knowledge. Some don't like that he was not required to purchase a second seat. And others are pissed that we're even talking about this photo in the first place.

Obesity in the sky has become a high-priority issue in recent years, as airlines have added (or begun to enforce) policies that require larger passengers (who cannot fit into one seat) to purchase a second ticket. American Airlines doesn't have a strict policy but urges passengers to "recognize ahead of time that they may need to purchase two seats."

Perhaps the most talked about is Southwest's customer of size policy that insists passengers who cannot lower both armrests buy a second ticket, which is reimbursed if the flight is not full. (Many other airlines do not offer a refund.)

Opponents of these policies argue that passengers are buying tickets to get from one place to another, not a piece of real estate on the plane. Supporters disagree.

No one wants to be stuffed next to a person who needs two seats and only buys one -- but does that make these rules acceptable?