Well, what are these methods you are referring to? In the case of drunk drivers, they are a danger to everyone else and a drunk driver must be stopped as soon as possible. It's no good letting them go home (as they could still cause lots of damage) and then arresting them.

The only way I can think of stopping cars with dangerous drivers without chasing them would be fitting remote control devices to every single vehicle on the road enabling the police to switch off the engine at will (this has been done with "bait" cars for trapping car thieves) but how much would that cost?

With all due respect wrenchhead, I wouldn't have this kind of debate with someone like Ford Guy who actually does police work (unless you've ever worked as a police officer yourself), just like I wouldn't tell a soldier who is serving in Iraq what he should be doing.