One more point. That is a guy who is making sport show, a star. He is expected by public to be "a real man". In that situation he had several options to earn respect from simple public. He could take a banana and make with it something funny, he could throw a banana back, he could show a middle finger or a fist to the banana thrower, he could just ignore the situation - that would be good enough. Instead he behaved like a spoiled child.
After that he must be ready to expect much more bananas from his former fans, I think.