re: How many would recognize a celebrity on their flight?

Willie Roaf (New Orleans Saints legendary Offensive Tackle for non-sports fans) boarded a SW flight (only coach seats) that I was already seated on. This was years ago before he got the big contracts after making All-Pro. He had two of his kids with him that were little at the time.

I didn't see him sitting since I was in front and he went toward back, but I assume he took all of a row with his kids so that he could fit. Very big dude.