> * The colluders share, amongst themselves, the titles of each other's papers, violating the tenet of blind reviewing and creating a significant undisclosed conflict of interest.
> * The colluders hide conflicts of interest, then bid to review these papers, sometimes from duplicate accounts, in an attempt to be assigned to these papers as reviewers.
Is it that common that conference reviewers also submit papers to the conference? Wouldn't that alone already be a conflict of interest? (After all, you then have an interest in dismissing as many papers as possible to increase the likelihood of your own paper being accepted). And how do you create "duplicate accounts"? The conferences I have submitted to, and reviewed for, all had an invitation-like process for potential reviewers.