1，有些人参加活动主要是为了做营销推广，销售自家产品之类的，这个时候秘书处希望可以将这部分进行标记，然后不允许他报名参加后续活动，这个时候可以采用黑名单标签的功能
对于被标记为黑名单标签的用户，报名的时候系统会进行拦截，如下图：
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