No, not at all. If cops actually did their job, and drove around on patrol, they'd catch offenders in the act. Drunks swerve around and drive poorly, they are easy to spot. Erradic driving is probable cause to stop a car. Running a stop sign, even changing lanes without using a turn signal. All probable cause to stop a car. Upholding the 4th amendment does not make law enforcement impossible - it just means they have to do their job.This is just a weird practice right? I mean, really quite strange. Upholding elements of the constitution (such as the 4th amendment) effectively seems to make it impossible to introduce any element of reasonable subtlety into the practice of law making and law enforcement. Is it worth it?
And before anybody has a go at me for attacking the American system, I'm not. I'm just trying to understand it.
Think of it this way - without the 4th amendment, it would be perfectly legal for your local police department, the FBI, the INS, and even the IRS to go door to door searching homes as they please, and even installing cameras inside every home in the nation!! Orwellian enough for you yet? All those things would be perfectly legal if it wasn't for the 4th amendment. It's what gives you your right to privacy inside your own home (and inside your car, and on your person)
I see you're in the UK, so it's a very good question you asked! There must be something similar to the 4th amendment in the UK system, no?