I like to look at things from a different point of view...
Say, for instance, an officer is going to a call that requires that he/she get there soon, but doesn't quite require the use of lights/siren. So he gets behind some motorist hogging the lane and/or possibly refusing to move over. The next thing the officer knows is that the aforementioned motorist is slamming on the brakes to supposedly "teach the cop a lesson." So the motorist get's hurt, the cop get's hurt, there's thousands of dollars in property damage costs and medical bills, and I guarantee the cop will likely charge the motorist with aggravated assault. The only one who wins in a situation like this is the personal injury attorney, and the insurance industry has another statistic from which to try and raise all of our rates. Would you really want to risk your life or the life of someone else and damage your own property for something so stupid? You don't know what the officer is thinking and or doing, so why force an unpredictable situation. If you want some real laughs, try pulling a fake gun on an officer.
Any time I'm "gaining" on another car, my foot's already on the brake so I'm actually decreasing on them. I always know my position in traffic and am thinking of my egress route if something happens. It comes with common sense, training and experience. However, if a cruiser was to gain quickly on you and not pass, just slow down and pull over. If the officer falls in behind you to ask you why, just say that you preceived that the officer was going to stop you because of how quickly the cruiser came up from behind.
BTW... it has nothing to do with "old folks" as much as it does with one's level of maturity.