If you're worried about taxpayer money I don't think that turning off those 250 devices will change much. If the FBI is still keen on surveilling those targets they'll do it without electronic help.
This means that the same level of invasion of privacy will occur (potentially more since physical surveillance can gather more information than a GPS tracker) but with less court approval and more cost.
Of course if we assume that the FBI was only tracking those 250 suspects because it was easy to do so then you're probably correct that turning them off will be a net saving to the tax payer.
This means that the same level of invasion of privacy will occur (potentially more since physical surveillance can gather more information than a GPS tracker) but with less court approval and more cost.
Of course if we assume that the FBI was only tracking those 250 suspects because it was easy to do so then you're probably correct that turning them off will be a net saving to the tax payer.