[...] I've been pulled over by the police many times in just the same way. They talk to you, ask you where it is you're going, check your info, then they issue you a warning and you're on your way.
[...]
So you get pulled over for failing to signal a lane change and the cop wants to know "where it is you're going," and you're okay with that?
I won't criticize you if you are willing to tell the cop where you're going, or where you've been, or why, or whatever intrusive assault on your privacy he chooses to impose, because you'd prefer to get a warning instead of a summons. In the proper mood I might be inclined to do the same. But wouldn't you prefer that the cop is not equipped with the power of
judging whether you get a warning or a summons based on his personal disposition toward you?
Warnings in the example of minor traffic infractions are typically issued to individuals who have clean driving records -- which should be the
only criterion for determining who gets a warning rather than a summons. It should not be up to the cop. Because cops are cops -- not judges. And a basic psychological principle in delegating authority, such as police authority, is recipients are likely to autonomously expand to the next higher level if not diligently supervised.
If a cop is allowed to tell a driver he pulls over for a minor traffic infraction to put his/her cigarette out, he soon will be asking where they are going, or where they've been, and with who, or whatever else might occur to him when in fact it is none of his business.
If a cop pulls you over for failing to signal a turn, unless there is some evidence of something illegal he has no right to assert his authority beyond that necessary to facilitate his immediate purpose, which is issuing a warning or a summons for the infraction he observed.
This is so because America is not a police state.
Yet.