I have a little bit of a weird situation. In a submission to conference (which is anonymous), I marked a member from the PC as conflict of interest (COI) due to personal reasons (rivalry). The chairs reached out for clarification, I provided the context and the chairs agreed that it is a conflict.
However, the PC, after been informed, has reached out directly to me in an accusatory tone and asked for an in-person meeting, and threaten action if not agreed to do so. What should I do?