...and, I might add, your fellow passengers.
Some simple airline etiquette that is definitely worth reading
Lance was just complaining about #2 because it happened to him on his flight from OKC to Denver yesterday morning. A woman threw her bag into the overhead bin right above Lance's seat, to where he had no room for his own carry-on, and then she found her seat in the back of the plane and had the gall to ask him to take down her bag for her when they were debarking the plane.
Manners, people...manners. The world would be a better place if more people used them.