OTRS means were dealing with those cases where the person is aware and kicking up a stink  we need to take action everywhere but especially where attention isnt already being called to it  those complaining to OTRS are already better off than those not doing so  The metric of multiple vandalism is very sensible it is a measure of where someone has enough badwill in the world at large to attract problematic edits in the first place  Your metric of vandalism not reverted in X seconds is also sensible since it shows where problematic edits are likely to persist  Both where likely to be created and where likely to persist are sensible points to focus on  Im not sure how you can argue otherwise