it is not good being polite to guys like that

这是一个IT做形式主语的句子,真正的主语是being polite to guys like that礼貌对待像他那样的男孩不好.正常语序是being polite to guys like that is not good.但是being polite to guys like that做主语,前后句子失衡,所以用IT作形式主语.
不能换成ABOUT