LOL. There are people that fly too much that would register with.
Once I was flying to Maui with my wife (who travelled a ton) and we stopped into the restaurant in the San Francisco airport and the waitress asked her if she wanted the usual.
I always thought it was bad etiquette to bring fried fish onto the plane...
So whenever I see someone open their Yankee Pier bag on the plane, I would always get ready for the smell. Thankfully, the air circulation on planes are very good - 5 exchanges every hour usually - so the smell does dilute fairly quickly.
