"Poor taste" is making on off-color remark or passing gas in someone's face.

"Menacing" on the other hand, is a crime.

I am all for the Second Amendment, but even under Second Amendment protections you are not allowed to brandish your weapon in a careless, joking manner at other people. Responsible gun owners on this Forum know that muzzle discipline and discreteness are critical aspects...which seem to have been thrown out the window by Arenas.

I believe an arrest may still be coming.

According to Wikipedia:

Menacing (in some states known as brandishing) is a violent crime in most state jurisdictions of the United States. Although the wording and degrees of offense vary slightly from state to state, the criminal act of menacing generally consists of displaying a weapon to a person with the intention of threatening them with bodily harm from said weapon.
It is distinct from other similar weapons-related crimes of violence such as "aggravated assault" or "assault with a deadly weapon" in that the charge of menacing requires neither an actual deadly weapon be displayed (any object wielded threateningly can be used to menace in many states), nor any actual physical contact. The display also need not be accompanied by a verbal threat; if the display of the weapon would cause a reasonable person to fear bodily harm from the perpetrator, the threat is considered to be implicit.
Degrees of offense range from a misdemeanor for first time offenders, to low to mid level felonies for offenders with a prior menacing charge.