David Beckham is well known for being delightful and generous in chatting to the cabin crew and giving autographs.
I think he has every right to be angry over the incident. However I think it unlikely he will transfer all his business to another airline because of the antics of one idiotic stewardess who will doubtless have been reprimanded.
David Beckham complains about being hassled by BA cabin crew - AOL Travel UK
I suspect she might not be quite as boastful as usual to her friends about how she carried David Beckam to LAX.