Most of the people, that post, on that particular thread are not cabin crew.
Take it from me that that website dose not represent the views of over 14,000 cabin crew. It is full of cabin crew haters, stirrers and people that don't even work for BA.
Take no notice of it because in reality BA cabin crew all get on fine. We all went through an interview process which was designed to take on people that get on with people and that's what the majority of us are doing.
Don't let what you read on that website alter your opinion because in real life we all get on fine!