Justice wrote:
"The Community Team want to make it very clear that we have an absolute zero tolerance policy when it comes to doxxing and any similar forms of harassment. Anyone who doxxes someone or helps with doxxing in any way, shape or form, regardless of any “reason” behind it, will be facing a Community Ban."

Knowing about someone doxxing another individual in the community and neglecting to report it to a member of the community team is considered "helping" to a certain extent as you are actively letting them continue doing it. You will most likely get punished for it depending on the severity of the doxxing and the amount of time you've known about it without reporting it to a community team member.