The alert "Shared the same computer" highlights when e.g. an author and a reviewer used the same machine - an apparently sure sign that the review was ghost-written by the author. But: I think the alert should actually be "Shared the same IP address, which may result from using the same computer", because people within the same building/institution may all have a single IP address. We have an example of an author suggesting a real reviewer from their own institute (which we then somehow invited), and they were flagged by this alert. Accusing the author of ghostwriting reviews would have been unjustified in this case.
