Neither do I, but stupidity is not a reason to be in jail.
Incorrect. It can be. For example, the crime of negligent manslaughter (and many instances of vehicular manslaughter) and several other crimes amount to, "You were dumb, and something bad happened as a result."
Abuse of power should never be excused
In neither case do we have the entire story, but in neither do we have clear evidence of abuse of power.
Noose-guy initiates aggressive posturing towards the officer while operating a vehicle - that, right there, is probable clause to pull him over, if only to determine if he's impaired by alcohol or drugs, as that behavior is unusual. Having done that, it is entirely on the up-and-up to peg you for any obvious technical issues the cop may find. In effect, the guy shouted from across the street for the cop to come and search him for actionable items, so the guy drives away with several tickets. No abuse of power.
The other gent got pulled over, and therefore (despite the news these days) we can assume there was likely a legally actionable issue at hand. While we do not know the full story, we can probably assume the interchange did not *end* with the donuts comment. Continuing in that line (failing to give straight answers to questions, for example) would eventually amount to obstructing the officer in the line of duty, which is itself actionable. While abuse of power is possible in this case, it is also possible the officer was legally justified.
In both cases, though, we have people being stupid when they shouldn't have. Rather than rail against the thing that *might* have happened, we note the thing we do know happened - stupidity.
There is a major point to note that it is possible for *both* the citizen and the cop to be in the wrong. Just because a cop may have overstepped his bounds does not excuse wrongs by the suspect.