Women really can't be over protective here. How to Handle Pests and Nuisances Refuse private chats or messaging. Then ignore all other attempts to private message you. Often this is enough to get them to give up and leave the room. This way you will not see anything said by that person, nor will you receive any private messages.
Most people give up soon and go off to find someone else to talk to.
It's imperative that ChanOps be fully aware of all activity in the room. Leave the room if you have to. In many cases, they will not act without them. You are NOT at fault here. If this person has harassed others get them to send their logs as well.