EranBot is highly useful, as people are being notified immediately or within a few days that their edit is an unacceptable copyright violation. For repeat / egregious violators, I follow up by monitoring the user's edits, and block if necessary. My hope is that early detection and warning will prevent the introduction of additional serial copyright violators like we have seen in the past and curtail the need to open further cases at the ridiculously backlogged WP:CCI (which has a five-year backlog of 155 cases, 76,218+ articles as of 7 April 2016).