The problem with most people is that they have done the wrong thing but simply cannot accept the fact that they were actually caught! Over the years I've had many encounters with the cops and amazingly, every single time I was actually doing the wrong thing, which is why they actually pulled me over in the first place....amazing isn't it?
Sure some of them seemed like bastards on power trips, but what do you expect when you're the 50th person that week he's had to tell off for doing the same wrong thing?
Maybe they should came upto the drivers window and say "oh hello dear, can you please try not to do that naughty thing again, its just a little bit dangerous and little sally crossing the road over there is scared, thanks muchly, please move along"
While people have an issue with the amount of power cops are given at their "discretion", if you're old enough to have a licence and be driving then its not too hard to accept the consequences. Want to speed? Accept you may be caught and given a fine. Want to drag your mate or do a launch from the far left lane to bypass all the traffic at the lights? Accept you may be caught and the cop that does so may not care for just giving a warning.
Anyone saying that they cannot drive without even chirping tyres and so forth is just jerking their chain that little bit too hard!