Well what is there to say?  This is a photo doing the rounds of an obese passenger who only had one seat in economy.  This apparently took place on an American Airlines flight recently and a flight attendant managed to get a snap of this fat guy wedged in all snug.  By all accounts the passenger wasn't expected to purchase two seats, as is generally the norm these days, and judging by the face of the guy sat next to him, it wouldn't have hurt for him to do so.

Naturally the individual declined their in flight meal, though this has been attributed to the fact he couldn't get his piggy fingers to lower the tray table.