Speed is the whole of the strategy
The evidence on graffiti is consistent and unsurprising: marks removed quickly are less likely to be replaced than marks left in place. A scheme that removes within days is managing a recurring nuisance. A scheme that removes within weeks is providing a surface that has been demonstrated to be unattended, and the volume tends to increase accordingly. Speed of response, rather than quality of removal, is what changes the pattern.
That makes approval speed more important than removal cost. A committee that meets monthly cannot respond in days unless it has delegated the decision in advance. Setting a standing arrangement with a limit and a nominated approver takes one agenda item and converts an intractable problem into a routine one that nobody has to discuss again. It also removes an item that would otherwise appear on every agenda for years.
