Actually, the 6'9" man was kicked off a Horizon Airlines flight. A 6'7" man had to stand for a Spirit Airlines flight.
I will say this: Spirit Airlines squishes more people onto a plane than I've ever seen. You know how your seat on airplanes almost never matches up with the windows? It is because the seats can be slid forward and backward to make room for more rows of seats. I'm 5'10" and even my knees were pressed firmly against the seat in front of me on a flight from Ft. Lauderdale to St. Thomas last year. Dude sitting next to me was probably 6'3-4 and he was crunched up like a pretzel. Good thing he was skinny.