Obviously, the charge was wrong, since it was dropped.

Looking back, I'm just trying to state that there is a precedent for law officers to bring someone in for a misdemeanor that is later dropped, when they are argumentative with a cop. It's not by law allowed; but it is done quite often, and I understand why they do it.

Either because they're loosing their temper, or they feel the individual in question needs time to cool down, or because they feel physically safer on their own turf.