My solution to this has been: Always have a dummy plug. I built this "on the fly" once by reconfiguring a service to use a blank copy of it's database, with per

My solution to this has been: Always have a dummy plug. I built this "on the fly" once by reconfiguring a service to use a blank copy of it's database, with permissions set to read-only. All the read queries succeeded, with zero results. All the write queries failed fast. It solved a hard problem fast.