Thank you very much for releasing this modification. It's used daily on our forum and we're now a step closed to ditching vBulletin.
One request, however.
Because we often have multiple people in the same household using our forums, we need to exempt linked from triggering the detector. So when a father and son, for example, have both logged in, we don't get any further alerts.
However, if a new account logs in from their computer, an alert will still be generated. If that turns out to be the brother then we can exempt his account also and so on.
For that reason I think it's important that we see login names rather than user IDs when loogin and exempt people.