As readers know, I spend a lot of time talking to people in departments with climate problems. One issue that arises in many cases is how to deal with the continued presence of people who are known or suspected to be a problem. Sometimes this is someone who has “done their time”– e.g. had a year of unpaid leave; sometimes it’s someone who was cleared of all charges but about whom suspicion still lingers; sometimes it’s someone trailing a history of well-known problems. What often comes up in conversations is the question of how to react to these situations. The situations differ from each other in many, many ways. But what’s common to them is that they create difficulties for the community– how to make the department as safe and welcoming a place as it can be for everyone is chief among them. What I’m asking about is not the formal remedies– in these cases they have already run their course. My concern is with what those concerned about climate can do to cultivate as good an atmosphere as possible in such a challenging situation. These situations are in fact quite widespread, so I’m guessing there is a lot of knowledge out there in our readership. I’d be grateful for your thoughts.